All Topics  
Diocletian

 
Diocletian

   Email Print
   Bookmark   Link






 

Diocletian



 
 
Gaius Aurelius Valerius Diocletianus (c. December 22, 244 – December 3, 311), born Diocles and commonly known as Diocletian , was Roman Emperor
Roman Emperor

The Roman Emperor was the ruler of the Roman Empire during the imperial period . The Romans had no single term for the office: Latin language titles such as imperator , Augustus , Caesar and princeps were all associated with it....
 from November 20, 284 to May 1, 305. Born to a Dalmatia
Dalmatia

Dalmatia is a region on the eastern coast of the Adriatic Sea, situated mostly in modern Croatia and spreading between the island of Rab in the northwest and the Bay of Kotor in the southeast....
n family of low status, he rose through the ranks of the military to become cavalry commander to the emperor Carus
Carus

Marcus Aurelius Carus was a Roman Emperor . During his short reign, Carus tried to follow the path of restoration of the empire strength marked by Aurelian and Probus....
. After the deaths of Carus and his son Numerian
Numerian

Marcus Aurelius Numerius Numerianus , known in English as Numerian, was a Roman Emperor , together with his brother Carinus. They were sons of Carus, a Gaul raised to the office of praetorian prefect under Emperor Probus in 282....
 on campaign in Persia, Diocletian was acclaimed emperor by the army.






Discussion
Ask a question about 'Diocletian'
Start a new discussion about 'Diocletian'
Answer questions from other users
Full Discussion Forum






Timeline

245   Born

284   Diocletian becomes Emperor.

285   Rival Emperors Carinus and Diocletian face each other in the Battle of the Margus. The latter emerges victorious.

286   Diocletian elevates Maximian as Caesar, or junior Emperor. Later in the year, Maximian is promoted to Augustus or co-Emperor.

287   Diocletian and Maximian become Roman Consuls

288   Campaign by Diocletian in Raetia.

289   Diocletian gains several victories along the Danube.

290   Diocletian and Maximian meet in Milan on the five-year anniversary of their rule to discuss their successes and failures.

291   Diocletian signs peace treaties with Axum and Nubia.

292   The Roman General Achilleus is proclaimed emperor in Alexandria. For two years he resists Diocletian's army, but in the end the rebellion is crushed.







Encyclopedia


Gaius Aurelius Valerius Diocletianus (c. December 22, 244 – December 3, 311), born Diocles and commonly known as Diocletian , was Roman Emperor
Roman Emperor

The Roman Emperor was the ruler of the Roman Empire during the imperial period . The Romans had no single term for the office: Latin language titles such as imperator , Augustus , Caesar and princeps were all associated with it....
 from November 20, 284 to May 1, 305. Born to a Dalmatia
Dalmatia

Dalmatia is a region on the eastern coast of the Adriatic Sea, situated mostly in modern Croatia and spreading between the island of Rab in the northwest and the Bay of Kotor in the southeast....
n family of low status, he rose through the ranks of the military to become cavalry commander to the emperor Carus
Carus

Marcus Aurelius Carus was a Roman Emperor . During his short reign, Carus tried to follow the path of restoration of the empire strength marked by Aurelian and Probus....
. After the deaths of Carus and his son Numerian
Numerian

Marcus Aurelius Numerius Numerianus , known in English as Numerian, was a Roman Emperor , together with his brother Carinus. They were sons of Carus, a Gaul raised to the office of praetorian prefect under Emperor Probus in 282....
 on campaign in Persia, Diocletian was acclaimed emperor by the army. A brief confrontation with Carus' other surviving son Carinus
Carinus

Marcus Aurelius Carinus was Roman Emperor and elder son of the Emperor Carus, on whose accession he was appointed governor of the western portion of the empire....
 at the Battle of the Margus
Battle of the Margus

The Battle of the Margus was fought in May 285 between the armies of Roman Emperors Diocletian and Carinus in the valley of the Margus River in Moesia ....
 removed the only other claimant to the title. With his ascension to power, he ended the Crisis of the Third Century
Crisis of the Third Century

Crisis of the Third Century was the crumbling and near collapse of the Roman Empire between 235 and 284 caused by invasion, civil war, Plague of Cyprian, and economic collapse....
, marking the difference between the classical world
Classical antiquity

Classical antiquity is a broad term for a long period of cultural history centered on the Mediterranean Sea, comprising the interlocking civilizations of Ancient Greece and Ancient Rome....
 and the world of late antiquity
Late Antiquity

Late Antiquity is a periodization used by historians to describe the transitional centuries from Classical antiquity to the Middle Ages, in both mainland Europe and the Mediterranean world: generally from the end of the Roman Empire's Crisis of the Third Century to the Islamic conquests and the re-organization of the Byzantine Empire under...
. Diocletian appointed fellow-officer Maximian
Maximian

Marcus Aurelius Valerius Maximianus Herculius , commonly referred to as Maximian, was Caesar from July 285 and Augustus from April 1, 286 to May 1, 305....
 his Augustus, his senior co-emperor, in 285. He delegated further on March 1, 293, appointing Galerius
Galerius

Galerius Maximianus , formally Gaius Galerius Valerius Maximianus was Roman Emperor from 305 to 311....
 and Constantius
Constantius Chlorus

Flavius Valerius Constantius , also Constantius I, was an Roman emperor of the Western Roman Empire . He was commonly called Chlorus an epithet given to him by Byzantine Empire historians....
 as Caesars
Caesar (title)

Caesar , Latin: Caesar , is a title of emperor character. It derives from the Roman naming convention#Cognomen of Julius Caesar, the Roman dictator....
, junior co-emperors. Under this "Tetrarchy
Tetrarchy

Tetrarchy can be applied to any system of government where power is divided between four individuals. The term is usually used to refer to the tetrarchy instituted by Roman Emperor Diocletian in 293 which lasted until c. 313....
", or "rule of four", each emperor would rule over a quarter-division of the empire. In campaigns against Sarmatian
Sarmatians

The Sarmatians, Sarmat? or Sauromat? were a people of Ancient Iranian peoples origin. Mentioned by Classics authors, they migrated from Central Asia to the Ural Mountains around fifth century B.C....
 and Danubian
Danube

The Danube is the longest river in the European Union and Europe's second longest river after the Volga.The river originates in the Black Forest in Germany as the much smaller Brigach and Breg River rivers which join at the eponymously named German town Donaueschingen, after which it is known as the Danube and flows eastwards for a distance...
 tribes (285–90), the Alamanni
Alamanni

The Alamanni, Allemanni, or Alemanni were originally an alliance of Germanic languagess located around the upper Main river . One of the earliest references to them is the cognomen Alamannicus assumed by Caracalla, who ruled the Roman Empire from 211?17 and claimed thereby to be their defeater....
 (288), and usurpers in Egypt (297–98), Diocletian secured the empire's borders and purged it of threats to his power. In 299, Diocletian led negotiations with Sassanid Persia, the empire's traditional enemy, and achieved a lasting and favorable peace.

Diocletian separated and enlarged the empire's civil and military services and re-organized the empire's provincial divisions, establishing the largest and most bureaucratic
Bureaucracy

Bureaucracy is the structure and set of regulations in place to control activity, usually in large organizations and government. As opposed to adhocracy, it is represented by standardized procedure that dictates the execution of most or all processes within the body, formal division of powers, hierarchy, and relationships....
 government in the history of the empire. He established new administrative centers in Nicomedia
Nicomedia

Nicomedia was founded by Nicomedes I of Bithynia at the head of the Gulf of Astacus which opens to the Propontis. In earlier antiquity, the city was called Astacus or Olbia ....
, Mediolanum
Mediolanum

Mediolanum, the ancient Milan, was an important Celts and then Ancient Rome centre of northern Italy. This article charts the history of the city from its settlement by the Insubres around 600 BC, through its conquest by the Ancient Rome and its development into a key centre of Western Christianity and capital of the Western Roman Empire, un...
, Antioch
Antioch

Antioch on the Orontes was an ancient city on the eastern side of the Orontes River. It is near the modern city of Antakya, Turkey.Founded near the end of the 4th century BC by Seleucus I Nicator, one of Alexander the Great's generals, Antioch eventually rivaled Alexandria as the chief city of the nearer East and was a cradle of gentile hi...
, and Trier
Trier

Trier is a city in Germany on the banks of the Moselle River. It is the oldest city in Germany, founded in or before 16 BC. Trier is not the only city claiming to be Germany's oldest, but it is the only one that bases this assertion on having the longest history as a city, as opposed to a mere settlement or army camp....
, closer to the empire's frontiers than the traditional capital at Rome had been. Building on third-century trends towards absolutism, Diocletian styled himself an autocrat, elevating himself above the empire's masses with imposing forms of court ceremonial and architecture. Bureaucratic and military growth, constant campaigning, and construction projects increased the state's expenditures, and necessitated a comprehensive tax reform. From at least 297 on, imperial taxation was standardized, made more equitable, and levied at generally higher rates.

Not all Diocletian's plans were successful; the Edict on Maximum Prices
Edict on Maximum Prices

The Edict on Maximum Prices was issued in 301 by Roman Emperor Diocletian.During the Crisis of the Third Century, Roman coins had been greatly debased by the numerous emperors and Roman usurpers who minted their own coins of decreasing true metallic value to pay soldiers and public officials....
 (301), Diocletian's attempt to curb inflation
Inflation

In economics, inflation is a rise in the general price level of goods and services in an economy over a period of time. The term "inflation" once referred to increases in the money supply ; however, economic debates about the relationship between money supply and price levels have led to its primary use today in describing price inflatio...
 via price controls, was unsuccessful, counterproductive, and quickly ignored. Although effective while he ruled, Diocletian's Tetrarchic system collapsed after his abdication under the competing dynastic claims of Maxentius
Maxentius

Marcus Aurelius Valerius Maxentius was Western Roman Emperor from 306 to 312. He was the son of former emperor Maximian, and the son-in-law of Galerius, also an emperor....
 and Constantine
Constantine I

Flavius Valerius Aurelius Constantinus , commonly known in English_language as Constantine I, Constantine the Great, or Saint Constantine , was Roman Emperor from 306, and the undisputed holder of that office from 324 until his death in 337....
, sons of Maximian and Constantius respectively. The Diocletianic Persecution (303–311), the empire's last, largest, and bloodiest official persecution of Christianity
Christianity

Christianity is a Monotheistic religion #Christian view religion centered on the life and teachings of Jesus as New Testament view on Jesus' life....
, did not destroy the empire's Christian community; indeed, after 324 Christianity became the empire's preferred religion under its first Christian emperor, Constantine. In spite of his failures, Diocletian's reforms fundamentally changed the structure of Roman imperial government and helped stabilize the empire economically and militarily, enabling an empire that had seemed near the brink of collapse in Diocletian's youth to remain essentially intact for another hundred years. Weakened by illness, Diocletian left the imperial office on May 1, 305, and became the first Roman emperor to voluntarily abdicate the position. He lived out his retirement in his palace
Diocletian's Palace

Diocletian's Palace is a building in Split , Croatia that was built by the emperor Diocletian at the turn of the fourth century AD.Diocletian built the massive palace in preparation for his retirement on May 1, 305 AD....
 on the Dalmatian coast, tending to his vegetable gardens.

Early life

Diocletian was probably born near Salona
Salona

Salona was an ancient Illyrian Delmati city in the first millennium Before Christ. After conquest by the Romans, Salona became the capital of the Roman Empire province of Dalmatia....
 in Dalmatia
Dalmatia

Dalmatia is a region on the eastern coast of the Adriatic Sea, situated mostly in modern Croatia and spreading between the island of Rab in the northwest and the Bay of Kotor in the southeast....
 (Solin in modern Croatia
Croatia

Croatia , officially the Republic of Croatia , is a Central European country at the crossroads of Pannonian Plain, Balkans, and the Mediterranean Sea....
), some time around 244. His parents named him Diocles, or possibly Diocles Valerius. The modern historian Timothy Barnes
Timothy Barnes

Timothy David Barnes is a United Kingdom Classics.Timothy David Barnes was born in Yorkshire in 1942. He was educated at Queen Elizabeth Grammar School, Wakefield until 1960, going up to Balliol College, Oxford, where he read Literae Humaniores, taking his Bachelor of Arts in 1964 and Master of Arts in 1967....
 takes December 22 as his birthdate, but other historians are not so certain. Diocles' parents were of low status, and writers critical of him claimed that his father was a scribe
Scribe

A scribe is a person who writes books or documents by hand as a profession. The profession, previously found in all literate cultures in some form, lost most of its importance and status with the advent of printing....
 or a freedman
Freedman

Freedman is the term used to describe a former Slavery who has been Manumission or Emancipation. The first means the freeing of an individual by the owner, often through deed or will, and sometimes by legislative petition....
 of the senator Anullinus, or even that Diocles was a freedman himself. The first forty years of his life are mostly obscure. The Byzantine
Byzantine Empire

Byzantine Empire and Eastern Roman Empire are conventional names used to describe the Roman Empire during the Middle Ages, centered on its capital of Constantinople....
 chronicler Joannes Zonaras
Joannes Zonaras

Ioannes Zonaras was a Byzantine Empire chronicler and theology, who lived at Constantinople.Under Emperor Alexios I Komnenos he held the offices of Drungarios of the Vigla and private secretary to the emperor, but after Alexios' death, he retired to the monastery of St Glykeria, where he spent the rest of his life in writing books....
 states that he was Dux
Dux

Dux is Latin for leader and for duke, and in Ancient Rome could refer to anyone who commanded troops, such as tribal leaders....
 Moesia
Moesia

Moesia was an ancient region and Roman province situated in the areas of modern Serbia, Bulgaria and Romania along the south bank of the Danube River....
e
, a commander of forces on the lower Danube
Danube

The Danube is the longest river in the European Union and Europe's second longest river after the Volga.The river originates in the Black Forest in Germany as the much smaller Brigach and Breg River rivers which join at the eponymously named German town Donaueschingen, after which it is known as the Danube and flows eastwards for a distance...
. The unreliable Historia Augusta states that he served in Gaul, where he received an omen of his future rule, but this statement is not corroborated by other sources. In 282, the legions of the upper Danube in Raetia
Raetia

File:REmpire Rhetia.pngRaetia was a Roman province of the Roman Empire, bounded on the west by the country of the Helvetii, on the east by Noricum, on the north by Vindelicia, and on the south by Cisalpine Gaul....
 and Noricum
Noricum

Noricum, in ancient history geography, was a Celtic kingdom stretching over the area of today's Austria and Slovenia. It became a Roman province of the Roman Empire....
 proclaimed the praetorian prefect
Praetorian prefect

Praetorian prefect was the constant title of a high office in the Roman Empire state that changed fundamentally in nature.The praetorian prefect was commander of the Praetorian Guard until Constantine I abolished the guard in 314....
 M. Aurelius Carus
Carus

Marcus Aurelius Carus was a Roman Emperor . During his short reign, Carus tried to follow the path of restoration of the empire strength marked by Aurelian and Probus....
 as emperor, beginning a rebellion against what had been the apparently secure government of the emperor Probus
Probus

Marcus Aurelius Probus was a Roman Emperor .A native of Sirmium , in Pannonia, at an early age he entered the army, where he distinguished himself under the Emperors Valerian , Aurelian and Marcus Claudius Tacitus....
. Probus' army, stationed in Sirmium
Sirmium

Sirmium was an ancient city in Roman Pannonia. Sirmium originally was an Illyrians town conquered by the Ancient Rome in the 1st century BC. It was a very important town in the later Roman Empire, being the economic capital of Roman Pannonia and one of the four capital cities of the Roman Empire....
 (Sremska Mitrovica
Sremska Mitrovica

Sremska Mitrovica is a city and municipality located in the Vojvodina province of Serbia at 44.98? North, 19.61? East, on the left bank of the Sava river....
, Serbia
Serbia

Serbia , officially the Republic of Serbia , is a country in Central Europe and Balkans Europe, covering the southern part of the Pannonian Plain and the central part of the Balkans....
), decided against fighting Carus, and assassinated Probus instead. Diocles soon gained Carus' trust, for Carus declared him commander of the Protectores Domestici, the cavalry arm of the imperial bodyguard.

Carus, already sixty, wished to establish a dynasty; he immediately elevated his sons Carinus
Carinus

Marcus Aurelius Carinus was Roman Emperor and elder son of the Emperor Carus, on whose accession he was appointed governor of the western portion of the empire....
 and Numerian
Numerian

Marcus Aurelius Numerius Numerianus , known in English as Numerian, was a Roman Emperor , together with his brother Carinus. They were sons of Carus, a Gaul raised to the office of praetorian prefect under Emperor Probus in 282....
 to the rank of Caesar. In 283, Carus raised Carinus to the title Augustus, left him in charge of the care of the West, and moved with Numerian, Diocles, and the praetorian prefect Aper
Aper - L. Flavius Aper

Aper was the cognomen of a Roman general of the Third Century AD. His full name is thought to have been L. Flavius Aper. The information concerning him recited here is derived from L.L....
 to the East, against the Sassanid Empire
Sassanid Empire

The Sassanid Empire or Sassanian Dynasty is the name of the last pre-Islamic Iranian empire. It was one of the two main powers in Western Asia for a period of more than 400 years....
. The Sassanids had been embroiled in a succession dispute since the death of Shapur
Shapur

Shapur is a Persian male given name.Shapur can refer to one of three Sassanid dynasty kings:*Shapur I - 241 to 272*Shapur II - 309 to 379...
, and were in no position to oppose Carus' advance. According to Zonaras, Eutropius
Eutropius

IntroductionNot much is known about the early life of Eutropius because there are no written texts that document his life. Eutropius should not be confused with Eutropius of Valencia or Saint Eutropius....
, and Festus
Festus (historian)

Festus was a late Roman historian whose epitome was commissioned by the emperor Valens in preparation for Valens#Conflict with the Sassanids....
, Carus won a major victory against the Persians, taking Seleucia
Seleucia

Seleucia was the first capital of the Seleucid Empire, and one of the great cities of antiquity standing in Mesopotamia, on the Tigris River....
 and the Sassanid capital of Ctesiphon
Ctesiphon

Ctesiphon was one of the great cities of the Persian Empire, located on the east bank of the Tigris.Ctesiphon was an imperial capital of the Arsacids and of their successors, the Sassanids....
 (near modern Al-Mada'in
Al-Mada'in

Al-Mada'in is the name of an ancient urban complex along the Tigris, in present-day Iraq, that was the site of the cities of Seleucia and Ctesiphon, and was also referred to as Seleucia-Ctesiphon....
, Iraq
Iraq

Iraq , officially the Republic of Iraq , is a country in Western Asia spanning most of the northwestern end of the Zagros Mountains, the eastern part of the Syrian Desert and the northern part of the Arabian Desert....
), cities on opposite banks of the Tigris
Tigris

The Tigris is the eastern member of the two great rivers that define Mesopotamia, along with the Euphrates, which flows from the mountains of southeastern Turkey through Iraq....
. In celebration, Carus and his sons took the title
Victory title

A victory title is an honorific title adopted by a successful military commander to commemorate his defeat of an enemy nation. This practice was first used by Ancient Rome and is still most commonly associated with the Romans, but it has also been adopted as a practice by many modern empires, especially Napoleonic, British and Russian....
 Persici maximi. Carus died in July or early August, reportedly struck by lightning.

Rise to power


Conflict with Carinus

After his accession, Diocletian and Lucius Caesonius Bassus were named as consuls. They assumed the fasces
Fasces

Fasces symbolize summary power and jurisdiction, and/or "strength through unity".The traditional ancient Rome fasces consisted of a bundle of white birch rods, tied together with a red leather ribbon into a cylinder, and often including a bronze axe amongst the rods, with the blade on the side, projecting from the bundle....
 in place of Carinus and Numerianus. Bassus was a member of a Campania
Campania

Campania is a Regions of Italy of southern Italy in Europe. The region has a population of around 5.8 million people, making it the second-most-populous region of Italy, its total area of 13,595 km? makes it the most densely populated region in the country....
n senatorial
Roman Senate

The Senate of the Roman Republic was a political institution in the ancient Roman Republic. According to the Greek historian Polybius, our principal source on the Constitution of the Roman Republic, the Roman Senate was the predominant branch of government....
 family, a former consul and a proconsul of Africa. He had been chosen by Probus for signal distinction. He was a man skilled in areas of government where Diocletian, presumably, had no experience. Diocletian's elevation of Bassus as consul symbolized his rejection of Carinus' government in Rome, his refusal to accept second-tier status to any other emperor, and his willingness to continue the long-standing collaboration between the empire's senatorial and military aristocracies. It also tied his success to that of the Senate, whose support he would need in an advance on Rome.

Diocletian was not the only challenger to Carinus' rule; the usurper M. Aurelius Julianus
Sabinus Iulianus

Marcus Aurelius Sabinus Iulianus was a Roman usurper against Roman Emperor Carinus or Maximian. It is possible that up to four usurpers with a similar name rebelled in a time-frame of a decade, but at least one of them is known by Numismatics evidence....
, Carinus' corrector Venetiae, took control of northern Italy
Italy

Italy , officially the Italian Republic , is a country located on the Italian Peninsula in Southern Europe and on the two largest islands in the Mediterranean Sea, Sicily and Sardinia....
 and Pannonia
Pannonia

Pannonia is an ancient province of the Roman Empire bounded north and east by the Danube, coterminous westward with Noricum and upper Italy, and southward with Dalmatia and upper Moesia....
 after Diocletian's accession. He minted coins from the mint at Siscia (Sisak
Sisak

Sisak is a city in central Croatia. The city's population in 2001 was 52,236 and it is the administrative centre of Sisak-Moslavina county....
, Croatia) declaring himself as emperor and promising freedom. It was all good press for Diocletian, and aided in his portrayal of Carinus as a cruel and oppressive tyrant. Julianus' forces were weak, however, and were handily dispersed when Carinus' armies moved from Britain to northern Italy. As leader of the united East, Diocletian was clearly the greater threat. Over the winter of 284–5, Diocletian advanced west across the Balkans
Balkans

The Balkans is the historical name of a geographic subregion of southeastern Europe. The region takes its name from the Balkan Mountains, which run through the centre of Bulgaria into eastern Serbia....
. In the spring, some time before the end of May, his armies met Carinus' across the river Margus (Great Morava) in Moesia
Moesia

Moesia was an ancient region and Roman province situated in the areas of modern Serbia, Bulgaria and Romania along the south bank of the Danube River....
. In modern accounts, the site has been located between the Mons Aureus (Seone, west of Smederevo
Smederevo

Smederevo is a city and municipality in Serbia on the Danube at 44.67? North, 20.93? East. In 2002 the city had a total population of 77,808, and the surrounding municipality had a population of 109,809....
) and Viminacium
Viminacium

Viminacium was a major city of the Roman Empire province of Moesia , and the capital of Moesia Superior. Viminacium was the base camp of Legio VII Claudia, and hosted for some time the Legio IIII Flavia Felix....
, near modern Belgrade
Belgrade

Belgrade is the capital and largest city of Serbia. The city lies on international waterway, at the confluence of the Sava River and Danube rivers, where the Pannonian Plain meets the Balkan Peninsula....
, Serbia.

Despite having the stronger army, Carinus held the weaker position. His rule was unpopular; it was subsequently alleged that Carinus had mistreated the Senate and seduced the wives of his officers. It is possible that Flavius Constantius
Constantius Chlorus

Flavius Valerius Constantius , also Constantius I, was an Roman emperor of the Western Roman Empire . He was commonly called Chlorus an epithet given to him by Byzantine Empire historians....
, the governor of Dalmatia and Diocletian's associate in the household guard, had already defected to Diocletian in the early spring. When the Battle of the Margus
Battle of the Margus

The Battle of the Margus was fought in May 285 between the armies of Roman Emperors Diocletian and Carinus in the valley of the Margus River in Moesia ....
 began, Carinus' prefect Aristobulus also defected. In the course of the battle, Carinus was killed by his own men. Following Diocletian's victory, both the western and the eastern armies acclaimed him emperor. Diocletian exacted an oath of allegiance from the defeated army and departed for Italy.

Early rule

Diocletian may have become involved in battles against the Quadi
Quadi

The Quadi were a smaller Germanic tribe, about which little definitive information is known. The history of non-literate peoples is written by their opponents, and we can only know the Germanic tribe the Romans called the 'Quadi' through Roman eyes....
 and Marcomanni
Marcomanni

The Marcomanni were a Germanic tribe, probably related to the Buri , Suebi or Suevi....
 immediately after the Battle of the Margus. He eventually made his way to northern Italy and made an imperial government, but it is not known whether Diocletian visited the city of Rome at this time. There is a contemporary issue of coins suggestive of an imperial adventus
Adventus (ceremony)

The adventus was a ceremony in ancient Rome, in which an Roman emperor was formally welcomed into a city either during a progress or after a military campaign, often Rome....
 (arrival) for the city, but some modern historians state that Diocletian avoided the city, and that he did so on principle; the city and its Senate were no longer politically relevant to the affairs of the empire, and needed to be taught as much. Diocletian dated his reign from his elevation by the army, not the date of his ratification by the Senate. If Diocletian ever did enter Rome, he did not stay long; he is attested back in the Balkans by November 2, 285, on campaign against the Sarmatians
Sarmatians

The Sarmatians, Sarmat? or Sauromat? were a people of Ancient Iranian peoples origin. Mentioned by Classics authors, they migrated from Central Asia to the Ural Mountains around fifth century B.C....
.

Diocletian replaced the prefect of Rome with his consular colleague Bassus. Most officials who had served under Carinus, however, retained their offices under Diocletian. In an act the epitomator Aurelius Victor
Aurelius Victor

Sextus Aurelius Victor was an historian and politician of the Roman Empire.Aurelius Victor was the author of a History of Rome from Augustus to Julian the Apostate , published ca....
 denotes as unusual act of clementia, Diocletian did not kill or depose Carinus' traitorous praetorian prefect and consul Ti. Claudius Aurelius Aristobulus, but confirmed him in both roles, and later gave him the proconsulate of Africa and the rank of urban prefect. The other figures who retained their offices might have also betrayed Carinus.

Tetrarchy


Conflict in the Balkans and Egypt

Philae, Trajan's Kiosk, Aswan, Egypt, Oct 2004
Diocletian spent the spring of 293 traveling with Galerius from Sirmium to Byzantium
Byzantium

Byzantium was an Ancient Greece city, which was founded by Greeks colonists from Megara in 667 BC and named after their king Byzas or Byzantas ....
 (Istanbul
Istanbul

Istanbul is the largest city in Turkey, List of metropolitan areas in Europe by population, and List of cities proper by population in the world with a population of 12.6 million....
, Turkey
Turkey

Turkey , known officially as the Republic of Turkey , is a Eurasian country that stretches across the Anatolian peninsula in southwest Asia and Thrace in the Balkans region of Southern Europe....
). Diocletian then returned to Sirmium, where he would remain for the following winter and spring. He campaigned against the Sarmatians again in 294, probably in the autumn, and won a victory against them. The defeat kept the Sarmatians from the Danube provinces for a long time. He built forts north of the Danube, at Aquincum
Aquincum

The ancient city of Aquincum was situated on the North-Eastern borders of the Pannonia province within the Roman Empire. The ruins of the city can be found today in Budapest, capital city of Hungary....
 (Budapest
Budapest

Budapest is the Capitals of Hungary of Hungary. As the largest city of Hungary, it serves as the country's principal political, cultural, commerce, Industry, and transportation center and is considered an important hub in Central Europe....
, Hungary
Hungary

Hungary , officially in English the Republic of Hungary , is a landlocked country in the Carpathian Basin of Central Europe, bordered by Austria, Slovakia, Ukraine, Romania, Serbia, Croatia, and Slovenia....
), Bononia (Vidin
Vidin

Vidin is a port town on the southern bank of the Danube in northwestern Bulgaria. It is close to the borders with Serbia and Romania, and is also the administrative centre of Vidin Province, as well as of the Metropolitan of Vidin ....
, Bulgaria), Ulcisia Vetera, Castra Florentium, Intercisa (Dunaújváros
Dunaújváros

Duna?jv?ros is a city in Central Hungary, along the Danube river. It is in the county of Fej?r....
, Hungary), and Onagrinum (Begec
Begec

Begec is a village in Serbian province of Vojvodina. It is located in Novi Sad municipality, in South Backa District. Begec is situated on the river Danube, approximately 15 km east from Novi Sad, on Backa Palanka-Novi Sad road....
, Serbia). The new forts became part of a new defensive line called the Ripa Sarmatica. In 295 and 296 Diocletian campaigned in the region again, and won a victory over the Carpi in the summer of 296. By the end of his reign, Diocletian had secured the entire length of the Danube, provided it with forts, bridgeheads, highways, and walled towns, and sent fifteen or more legions to patrol the region. The defense came at a heavy cost, but was a significant achievement in an area difficult to defend.

Galerius, meanwhile, was engaged in disputes in Upper Egypt
Upper Egypt

File:Ancient Egypt map-en.svgUpper Egypt is a narrow strip of land that extends from the Cataracts of the Nile section of Upper Egypt, between El-Ayait and Asyut is sometimes known as Middle Egypt....
. He would return to Syria in 295 to fight the revanchist Persian Empire. Diocletian's attempts to bring the Egyptian tax system in line with imperial standards stirred discontent, and a revolt swept the region after Galerius' departure. The usurper L. Domitius Domitianus
Domitius Domitianus

Lucius Domitius Domitianus was a Roman usurper against Diocletian, who seized the power for a short time in Aegyptus .Domitianus revolted against Diocletian in, but died in December of the same year, when Diocletian went to Aegyptus to quell with the revolt....
 declared himself Augustus in July or August 297. Much of Egypt, including Alexandria
Alexandria

Alexandria , with a population of 4.1 million, is the second-largest city in Egypt, and is the country's largest seaport, serving about 80% of Egypt's imports and exports....
, recognized his rule. Diocletian moved into Egypt to suppress him, first putting down rebels in the Thebaid
Thebaid

The Thebaid or Thebais is the region of ancient Egypt containing the thirteen southernmost nome of Upper Egypt, from Abydos, Egypt to Aswan....
 in the autumn of 297, then moving on to besiege Alexandria. Domitianus died in December 297, by which time Diocletian had secured control of the Egyptian countryside. Alexandria, whose defense was organized under Diocletian's former corrector
Corrector

A corrector is a person who or object that practices correction, usually by removing or rectifying errors.The word is originally a Roman title corrector, derived from the Latin verb corrigere, meaning "an action to rectify, to make right a wrong."...
 Aurelius Achilleus
Achilleus (emperor)

Achilleus assumed the title of emperor under Diocletian and reigned over Egypt for some time. He was possibly the corrector#Roman Antiquity of Domitius Domitianus....
, held out until a later date, probably March 298.

Bureaucratic affairs were completed during Diocletian's stay: a census took place, and Alexandria, in punishment for its rebellion, lost the ability to mint independently. Diocletian's reforms in the region, combined with those of Septimus Severus, brought Egyptian administrative practices much closer to Roman standards. Diocletian travelled south along the Nile the following summer, where he visited Oxyrhynchus
Oxyrhynchus

Oxyrhynchus is a city in Upper Egypt, located about 160 km south-southwest of Cairo, in the governorate of Al Minya Governorate. It is also an archaeological site, considered one of the most important ever discovered....
 and Elephantine
Elephantine

Elephantine is an island in the Nile, located just downstream of the Cataracts of the Nile at at the southern border of Ancient Egypt. This region is referred to as Upper Egypt because the ancient Egyptians oriented themselves toward the direction from which the river flowed....
. In Nubia, he made peace with the Nobatae and Blemmyes
Blemmyes

The Blemmyes were a nomadic Nubian tribe described in Ancient Rome histories of the later empire. From the late third century on, along with another tribe, the Nobatia, they repeatedly fought the Romans....
 tribes. Under the terms of the peace treaty Rome's borders moved north to Philae
Philae

Philae or Pilak or P'aaleq or Arabic language: Anas el Wagud, is an island in the Nile River and the previous site of an Ancient Egyptian temple complex in southern Egypt....
 and the two tribes received an annual gold stipend. Diocletian left Africa quickly after the treaty, moving from Upper Egypt in September 298 to Syria in February 299. He met up with Galerius in Mesopotamia.

War with Persia


Peace negotiations
Narseh sent an ambassador to Galerius to plead for the return of his wives and children in the course of the war, but Galerius had dismissed him. Serious peace negotiations began in the spring of 299. Diocletian and Galerius' magister memoriae (secretary) Sicorius Probus were sent to Narseh to present terms. The conditions of the peace were heavy; Armenia returned to Roman domination, with the fort of Ziatha as its border; Caucasian Iberia
Caucasian Iberia

Iberia , also known as Iveria , was a name given by the ancient Ancient Greece and Roman Empire to the ancient Georgia kingdom of Kartli corresponding roughly to the eastern and southern parts of the present day Georgia....
 would pay allegiance to Rome under a Roman appointee; Nisibis, now under Roman rule, would become the sole conduit for trade between Persia and Rome; and Rome would exercise control over the five satrapies between the Tigris and Armenia: Ingilene, Sophanene (Sophene
Sophene

For the kingdom, please see Kingdom of Sophene.Sophene was a province of the Armenian Kingdom and of the Roman Empire, located in the south-west of the kingdom....
), Arzanene (Aghdznik
Aghdznik

Aghdznik , also known as Altzniq or Arzanene, was a region of old Armenia that existed before AD 300, when it was ruled by Bakur . About 330 it was incorporated into Siunik....
), Corduene
Corduene

Corduene was an ancient region located in northern Mesopotamia, present-day southeastern Turkey).According to the 1911 Encyclopaedia Britannica, Gordyene is the ancient name of the region of Bohtan ....
 (Carduene), and Zabdicene (near modern Hakkâri
Hakkari

Hakk?ri is a city in the far southeast of Turkey. The name Hakk?ri comes from the Neo-Aramaic Akkare . Today the city has a population of 58,145 and is the capital of Hakk?ri Province....
, Turkey). These regions included the passage of the Tigris through the Anti-Taurus
Anti-Taurus Mountains

Anti-Taurus is a mountain range in southern and eastern Turkey, curving northeast from the Taurus Mountains. The tallest mountain in the range is Mount Erciyes, ...
 range; the Bitlis
Bitlis

Bitlis is a town in eastern Turkey and the capital of Bitlis Province. Kurdish people form the majority of the population, which was 65,169 as of 2000....
 pass, the quickest southerly route into Persian Armenia; and access to the Tur Abdin
Tur Abdin

Tur Abdin is a hilly region of south east Turkey incorporating the eastern half of Mardin Province, and Sirnak Province west of the Tigris, on the border with Syria....
 plateau.

A stretch of land containing the later strategic strongholds of Amida (Diyarbakir
Diyarbakir

Diyarbakir is the largest city in southeastern Turkey. Situated on the banks of the River Tigris, it is the seat of Diyarbakir Province, and has a population of 2.5 million....
, Turkey) and Bezabde came under firm Roman military occupation. With these territories, Rome would have an advance station north of Ctesiphon, and would be able to slow any future advance of Persian forces through the region. The Tigris was said to have become the boundary between the two empires, but what this means is unclear, as the satrapies listed all lie on the far side of the river. Millar suggests that the satrapies might have been held under a loose Roman hegemony, without military occupation. At the conclusion of the peace, Tiridates regained both his throne and the entirety of his ancestral claim. Rome secured a wide zone of cultural influence, which led to a wide diffusion of Syriac Christianity
Syriac Christianity

Syriac Christianity is a culturally and linguistically distinctive community within Eastern Christianity. It has its roots in the Near East, and is represented by a number of Christian denominations today, mainly in the Middle East and in Kerala, India....
 from a center at Nisibis in later decades, and the eventual Christianization of Armenia.

Religious persecutions


Early persecutions

At the conclusion of the peace, Diocletian and Galerius returned to Syrian Antioch. At some time in 299, the emperors took part in a ceremony of sacrifice
Sacrifice

Sacrifice is commonly known as the practice of offering food, objects , or the lives of animals or people to the deity as an act of propitiation or worship....
 and divination
Divination

Divination is the attempt to gain insight into a question or situation by way of a standardized process or ritual. Diviners ascertain their interpretations of how a querent should proceed by reading signs, events, or omens, or through alleged contact with a supernatural agency....
 in an attempt to predict the future. The haruspices
Haruspex

File:Haruspex.pngIn Ancient Rome practice inherited from the Etruscan civilization, a haruspex was a man trained to practice a form of divination called haruspicy, hepatoscopy or hepatomancy....
 were unable to read the entrails of the sacrificed animals, and blamed Christians in the imperial household. The emperors ordered all members of the court to perform a sacrifice to purify the palace. The emperors sent letters to the military command, demanding the entire army perform the required sacrifices or face discharge. Diocletian was conservative in matters of religion, a man faithful to the traditional Roman pantheon and understanding of demands for religious purification, but Eusebius
Eusebius of Caesarea

Eusebius of Caesarea became the bishop of Caesarea Maritima c 314. He is often referred to as the Father of Church History because of his work in recording the history of the early Christianity church, especially Chronicon and Church_History_....
, Lactantius
Lactantius

Lucius Caelius Firmianus Lactantius was an early Christian author ....
 and Constantine
Constantine I

Flavius Valerius Aurelius Constantinus , commonly known in English_language as Constantine I, Constantine the Great, or Saint Constantine , was Roman Emperor from 306, and the undisputed holder of that office from 324 until his death in 337....
 state that it was Galerius, not Diocletian, who was the prime supporter of the purge, and its greatest beneficiary. Galerius, even more devoted and passionate than Diocletian, saw political advantage in the politics of persecution. He was willing to break with a government policy of inaction on the issue.

Antioch was Diocletian's primary residence from 299 to 302. He visited Egypt once, over the winter of 301–2, and issued a grain dole in Alexandria. Following some public disputes with Manicheans
Manichaeism

Manichaeism was one of the major Iranian Gnosticism religions, originating in Sassanid Persia. Although most of the original writings of the founding prophet Mani have been lost, numerous translations and fragmentary texts have survived....
, Diocletian ordered that the leading followers of Mani
Mani (prophet)

Mani was the founder of Manichaeism, an ancient gnostic religion that was once widespread but is now extinct. Mani was born of Iranian peoples parentage in Assuristan, located in modern-day Iraq, which was a part of the Persian Empire during Mani's life....
 be burnt alive along with their scriptures. In a March 31, 302 rescript from Alexandria, he declared that low-status Manicheans must be executed by the blade, and high-status Manicheans must be sent to work in the quarries of Proconnesus (Marmara Island
Marmara Island

Marmara is a Turkey island in the Sea of Marmara. It is the largest island in the Sea of Marmara that is the center of Marmara district in Balikesir Province....
, Turkey) or the mines of Phaeno in southern Palestine
Palestine

Palestine is a name which has been widely used since Roman times to refer to the region between the Mediterranean Sea and the Jordan River. It is derived from a name used already much earlier for a narrower geographical region, mainly along the coastal region....
. All Manichean property was to be seized and deposited in the imperial treasury. Diocletian found much to be offended by in Manichean religion: its novelty, its alien origins, the way it corrupted the morals of the Roman race, and its inherent opposition to long-standing religious traditions. Manichaeanism was also supported by Persia at the time, compounding religious dissent with international politics. Excepting Persian support, the reasons why he disliked Manichaenism were equally applicable, if not more so, to Christianity, his next target.

Great Persecution

Diocletian returned to Antioch in the autumn of 302. He ordered that the deacon
Deacon

Deacon is a role in the Christianity that is generally associated with service of some kind, but which varies among theological and denominational traditions....
 Romanus of Caesarea
Romanus of Caesarea

Saint Romanus of Caesarea is venerated as a martyr. In 303 or 304, at the beginning of the Diocletian persecution, a deacon called Romanus of Caesarea in Palestine suffered martyrdom at Antioch....
 have his tongue removed for defying the order of the courts and interrupting official sacrifices. Romanus was then sent to prison, where he was executed on November 17, 303. The arrogance of this Christian displeased Diocletian, and he left the city for Nicomedia in the winter, accompanied by Galerius. According to Lactantius, Diocletian and Galerius entered into an argument over imperial policy towards Christians while wintering at Nicomedia in 302. Diocletian argued that forbidding Christians from the bureaucracy and military would be sufficient to appease the gods, but Galerius pushed for extermination. The two men sought the advice of the oracle
Oracle

An oracle is a person or agency considered to be a source of wise counsel or prophecy opinion; an infallible authority, usually Spirituality in nature....
 of Apollo
Apollo

In Greek mythology and Roman mythology, Apollo , is one of the most important and many-sided of the Twelve Olympians. The ideal of the kouros , Apollo has been variously recognized as a god of light and the sun; truth and prophecy; archery; medicine and healing; music, poetry, and the arts; and more....
 at Didyma
Didyma

Didyma was an ancient Ionian sanctuary, the modern Didim, Turkey, containing a Temple and oracle of Apollo, the Didymaion. In Greek didyma means "twin", but the Greeks who sought a "twin" at Didyma ignored the Carian origin of the name....
. The oracle responded that "the just on earth" hindered Apollo's ability to provide advice. These "just", Diocletian was informed by members of the court, could only refer to the Christians of the empire. At the behest of his court, Diocletian acceded to demands for universal persecution.

On February 23, 303, Diocletian ordered that the newly built church at Nicomedia be razed. He demanded that its scriptures be burned, and seized its precious stores for the treasury. The next day, Diocletian's first "Edict against the Christians" was published. The edict ordered the destruction of Christian scriptures and places of worship across the Empire, and prohibited Christians from assembling for worship. Before the end of February, a fire destroyed part of the imperial palace. Galerius convinced Diocletian that the culprits were Christians, conspirators who had plotted with the eunuch
Eunuch

A eunuch is a castrated man, in particular one castrated early enough to have major hormonal consequences; the term usually refers to those castrated in order to perform a specific social function, as was common in many societies of the past....
s of the palace. An investigation was commissioned, but no responsible party was found. Executions followed anyway, and the palace eunuchs Dorotheus and Gorgonius
Gorgonius

Saint Gorgonius was a Christian martyr, part of the group Gorgonius, Peter Cubicularius and Dorotheus, who died in 304 AD at Nicomedia during the persecution of Emperor Diocletian....
 were executed. One individual, Peter, was stripped, raised high, and scourged. Salt and vinegar were poured in his wounds, and he was slowly boiled
Boiling to death

Boiling to death is a crude and torturous method of execution ....
 over an open flame. The executions continued until at least April 24, 303, when six individuals, including the bishop
Bishop

A bishop is an ordination or consecration member of the Clergy#Christian clergy who is generally entrusted with a position of authority and oversight....
 Anthimus
Anthimus of Nicomedia

Anthimus of Nicomedia , was the bishop of Nicomedia in Bithynia, where he was beheaded during a persecution of Christians, traditionally placed under Diocletian , in which "rivers of blood" flowed, according to Christian sources, which memorialized the "20,000 martyrs of Nicomedia"....
, were decapitated
Decapitation

Decapitation , or beheading, is the cutting off of the head of a person or animal. Beheading typically refers to the act of intentional decapitation, e.g., as a means of murder or capital punishment; it may be accomplished, for example, with an axe, sword, knife, wire, or by means of a guillotine....
. A second fire occurred sixteen days after the first. Galerius left the city for Rome, declaring Nicomedia unsafe. Diocletian would soon follow.

Although further persecutionary edicts followed, compelling the arrest of the Christian clergy and universal acts of sacrifice, the persecutionary edicts were ultimately unsuccessful; most Christians escaped punishment, and even pagans were generally unsympathetic to the persecution. The martyr
Martyr

The term martyr is most commonly used today to describe an individual who sacrifices his or her life in order to further a cause or belief for many....
s' sufferings strengthened the resolve of their fellow Christians. Constantius and Maximian did not apply the later persecutionary edicts, and left the Christians of the West unharmed. Galerius rescinded the edict in 311, announcing that the persecution had failed to bring Christians back to traditional religion. The temporary apostasy of some Christians, and the surrendering of scriptures, during the persecution played a major role in the subsequent Donatist
Donatist

The Donatists were followers of a belief considered a schism by the broader churches of the One, Holy, Catholic, and Apostolic Church tradition, and most particularly within the context of the religious milieu of the provinces of Roman North Africa in Late Antiquity....
 controversy. Within twenty-five years of the persecution's inauguration, the Christian emperor Constantine would rule the empire alone. He would reverse the consequences of the edicts, and return all confiscated property to Christians. Under Constantine's rule, Christianity would become the empire's preferred religion. Diocletian was demonized by his Christian successors: Lactantius intimated that Diocletian's ascendancy heralded the apocalypse, and in Serbian mythology, Diocletian is remembered as Dukljan
Dukljan

Dukljan or Dukljanin is a figure in Serbian mythology that is a reflection of the Roman emperor Diocletian. He is presented as the devil of God, possibly because of the real Diocletianic Persecution...
, the adversary
Devil

The Devil is the title given to the supernatural being, who, in mainstream Christianity, Islam, and some other religions, is believed to be a powerful, evil entity and the tempter of humankind....
 of God
God

God is a deity in theism and deism religions and other belief systems, representing either the sole deity in monotheism, or a principal deity in polytheism....
.

Later life


Illness and abdication

Split Hebrard Overall Color Restitution
Diocletian entered the city of Rome in the early winter of 303. On November 20, he celebrated, with Maximian, the twentieth anniversary of his reign (vicennalia), the tenth anniversary of the Tetrarchy (decennalia
Decennalia

Decennalia were Ancient Roman festivals celebrated with games every ten years by the Roman emperors.This festival owed its origin to the fact that in 27 BC, Augustus refused the supreme power offered to him for life....
), and a triumph for the war with Persia. Diocletian soon grew impatient with the city. It did not give enough deference to his supreme authority; it expected him to act the part of an aristocratic ruler, not a monarchic one. On December 20, 303, Diocletian cut short his stay in Rome and left for the north. He did not even perform the ceremonies investing him with his ninth consulate; he did them in Ravenna
Ravenna

Ravenna is a city and comune in the Emilia-Romagna region of Italy. The city is inland, but is connected to the Adriatic Sea by a canal. Ravenna once served as the seat of the Western Roman Empire and later the Ostrogoths and the Exarchate of Ravenna....
 on January 1, 304 instead. There are suggestions in the Panegyrici Latini
Panegyrici Latini

The Panegyrici Latini or Latin Panegyrics is a collection of twelve Ancient Rome panegyric orations. The authors of most of the speeches in the collection are anonymous, but appear to have been Gallic in origin....
 and Lactantius' account that Diocletian arranged plans for his and Maximian's future retirement of power in Rome. Maximian, according to these accounts, swore to uphold Diocletian's plan in a ceremony in the temple of Jupiter.

From Ravenna, Diocletian left for the Danube. There, possibly in Galerius' company, he took part in a campaign against the Carpi. He contracted a minor illness while on campaign, but his condition quickly worsened and he chose to travel in a litter
Litter (vehicle)

The litter is a class of wheelless vehicles, a type of human-powered transport, for the transport of persons. Examples of litter vehicles include jiao , sedan chairs , palanquin , and gama ....
. In the late summer he left for Nicomedia. On November 20, he appeared in public to dedicate the opening of the circus beside his palace. He collapsed soon after the ceremonies. Over the winter of 304–5 he kept within his palace at all times. Rumors alleging that Diocletian's death was merely being kept secret until Galerius could come to assume power spread through the city. On December 13, he seemed to have finally died. The city was sent into a mourning from which it was only retrieved by public declarations of his survival. When Diocletian reappeared in public on March 1, 305, he was emaciated and barely recognizable.

Galerius arrived in the city later in March. According to Lactantius, he came armed with plans to reconstitute the Tetrarchy, force Diocletian to step down, and fill the imperial office with men compliant to his will. Through coercion and threats, he eventually convinced Diocletian to comply with his plan. Lactantius also claims that he had done the same to Maximian at Sirmium. On May 1, 305, Diocletian called an assembly of his generals, traditional companion troops, and representatives from distant legions. They met at the same hill, out of Nicomedia, where Diocletian had been proclaimed emperor. In front of a statue of Jupiter, his patron deity, Diocletian addressed the crowd. With tears in his eyes, he told them of his weakness, his need for rest, and his will to resign. He declared that he needed to pass the duty of empire on to someone stronger. He thus became the first Roman emperor to voluntarily abdicate his title.

Most in the crowd believed they knew what would follow; Constantine and Maxentius, the only adult sons of a reigning emperor, men who long been preparing to succeed their fathers, would be granted the title of Caesar. Constantine had traveled through Palestine at the right hand of Diocletian, and was present at the palace in Nicomedia in 303 and 305. It is likely that Maxentius received the same treatment. In Lactantius' account, when Diocletian announced that he was to resign, the entire crowd turned to face Constantine. It was not to be: Severus
Flavius Valerius Severus

Flavius Valerius Severus was a Western Roman Emperor from 306 to 307.Severus was of humble birth, born in the Illyrian provinces around the middle of the third century AD....
 and Maximin
Maximinus

title = Roman Emperor of the Roman Empire|name=Maximinus Daia|full name =Gaius Valerius Galerius Maximinus Daia| image =...
 were declared Caesars. Maximin appeared and took Diocletian's robes. On the same day, Severus received his robes from Maximian in Milan. Constantius succeeded Maximian as Augustus of the West, but Constantine and Maxentius were entirely ignored in the transition of power. This did not bode well for the future security of the Tetrarchic system.

Retirement and death

Diocletian retired to his homeland, Dalmatia. He moved into the expansive palace
Diocletian's Palace

Diocletian's Palace is a building in Split , Croatia that was built by the emperor Diocletian at the turn of the fourth century AD.Diocletian built the massive palace in preparation for his retirement on May 1, 305 AD....
 he had built on the Adriatic
Adriatic Sea

The Adriatic Sea is a body of water separating the Italian Peninsula from the Balkan peninsula, and the system of the Apennine Mountains from that of the Dinaric Alps and adjacent ranges....
 near the administrative center of Salona. Maximian retired to villas in Campania
Campania

Campania is a Regions of Italy of southern Italy in Europe. The region has a population of around 5.8 million people, making it the second-most-populous region of Italy, its total area of 13,595 km? makes it the most densely populated region in the country....
 or Lucania
Lucania

Lucania was an ancient district of southern Italy, extending from the Tyrrhenian Sea to the Gulf of Taranto. To the north it adjoined Campania, Samnium and Apulia, and to the south it was separated by a narrow isthmus from the district of Bruttium....
. Their homes were distant from political life, but Diocletian and Maximian were close enough to remain in regular contact with each other. Galerius assumed the consular fasces in 308 with Diocletian as his colleague. In the autumn of 308, Galerius again conferred with Diocletian at Carnuntum
Carnuntum

Carnuntum was an important Roman Empire army camp in what is now Austria. It belonged originally to Noricum province, but after the 1st century was part of Pannonia....
 (Petronell-Carnuntum
Petronell-Carnuntum

Petronell-Carnuntum is a community of Bruck an der Leitha in Austria. Petronell-Carnuntum takes up about 25,36 square kilometers and 1,158 inhabitants ....
, Austria
Austria

Austria , officially the Republic of Austria , is a landlocked country in Central Europe. It borders both Germany and the Czech Republic to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the west....
). Diocletian and Maximian were both present on November 11, 308, to see Galerius appoint Licinius
Licinius

Valerius Licinianus Licinius was Roman emperor from 308 to 324.Of Dacian peasant origin, born in Moesia Superior, Licinius accompanied his close childhood friend, the Emperor Galerius, on the Persian expedition in 297....
 to be Augustus in place of Severus, who had died at the hands of Maxentius. He ordered Maximian, who had attempted to return to power after his retirement, to step down permanently. At Carnuntum people begged Diocletian to return to the throne, to resolve the conflicts that had arisen through Constantine's rise to power and Maxentius' usurpation. Diocletian's reply: "If you could show the cabbage
Cabbage

The cabbage is a leafy garden plant of the Family Brassicaceae , used as a Leaf vegetable. It is a herbaceous, biennial plant, dicotyledonous flowering plant distinguished by a short stem upon which is crowded a mass of leaves, usually green but in some varieties red or purplish, forming a characteristic compact, globular cluster ....
 that I planted with my own hands to your emperor, he definitely wouldn’t dare suggest that I replace the peace and happiness of this place with the storms of a never-satisfied greed."

He lived on for three more years, spending his days in his palace gardens. He saw his Tetrarchic system implode, torn by the selfish ambitions of his successors. He heard of Maximian's third claim to the throne, his forced suicide, his damnatio memoriae
Damnatio memoriae

Damnatio memoriae is the Latin language literally meaning "damnation of memory", in the sense of removed from the remembrance. It was a form of dishonor that could be passed by the Roman Senate upon treachery or others who brought discredit to the Roman State....
. In his own palace, statues and portraits of his former companion emperor were torn down and destroyed. Deep in despair and illness, Diocletian may have committed suicide
Suicide

Suicide is the intentional taking of one's own life. Many dictionaries also note the metaphorical sense of "willful destruction of one's self-interest"....
. He died on December 3, 311.

Reforms


Tetrarchic and ideological

Diocletian saw his work as that of a restorer, a figure of authority, whose duty it was to return the empire to peace, and recreate stability and justice where barbarian hordes had destroyed it. He arrogated, regimented and centralized political authority on a massive scale. In his policies, he enforced an imperial system of values on a diverse and sometimes unwilling provincial audience. In the imperial propaganda from the period, recent history is perverted and minimized in the service of the theme of the Tetrarchs as "restorers". Aurelian's achievements are ignored, the revolt of Carausius is backdated to the reign of Gallienus, and it is implied that the Tetrarchs engineered Aurelian's defeat of the Palmyrenes
Palmyrene Empire

The Palmyrene Empire was a splinter empire that broke off the Roman Empire during the Crisis of the Third Century. It encompassed the Roman provinces of Syria , Syria Palaestina, Aegyptus and large parts of Asia Minor....
; the period between Gallienus and Diocletian is effectively erased. The history of the empire before the Tetrarchy is portrayed as a time of civil war, savage despotism, and imperial collapse. In those inscriptions that bear their names, Diocletian and his companions are referred to as "restorers of the whole world", men who succeeded in "defeating the nations of the barbarians, and confirming the tranquility of their world". Diocletian was written up as the "founder of eternal peace". The theme of restoration was conjoined to an emphasis on the uniqueness and accomplishments of the Tetrarchs themselves.

The cities where emperors lived frequently in this period—Milan, Trier
Trier

Trier is a city in Germany on the banks of the Moselle River. It is the oldest city in Germany, founded in or before 16 BC. Trier is not the only city claiming to be Germany's oldest, but it is the only one that bases this assertion on having the longest history as a city, as opposed to a mere settlement or army camp....
, Arles
Arles

Arles is a city in the south of France, in the Bouches-du-Rh?ne Departments of France, of which it is a Subprefectures in France, in the former Provinces of France of Provence....
, Sirmium, Serdica, Thessaloniki
Thessaloniki

Thessaloniki , Thessalonica, or Salonica is the List of largest cities and second largest cities by country in Greece and the capital of Macedonia , the nation's largest Regions of Greece....
, Nicomedia, and Antioch
Antioch

Antioch on the Orontes was an ancient city on the eastern side of the Orontes River. It is near the modern city of Antakya, Turkey.Founded near the end of the 4th century BC by Seleucus I Nicator, one of Alexander the Great's generals, Antioch eventually rivaled Alexandria as the chief city of the nearer East and was a cradle of gentile hi...
—were treated as alternate imperial seats, to the exclusion of Rome and its senatorial elite. A new style of ceremony was developed, emphasizing the distinction of the emperor from all other persons. The quasi-republican ideals of Augustus' primus inter pares
Primus inter pares

Primus inter pares , the first among equals, or first among peers is a phrase which indicates that a person is the most senior of a group of people sharing the same rank or office....
 were abandoned for all but the Tetrarchs themselves. Diocletian took to wearing a gold crown and jewels, and forbade the use of purple cloth
Tyrian purple

Tyrian purple , also known as royal purple, imperial purple or imperial dye, is a purple-red dye which was first produced by the ancient Phoenicians in the city of Tyre, Lebanon....
 to all but the emperors. His subjects were required to prostrate themselves in his presence (adoratio); the most fortunate were allowed the privilege of kissing the hem of his robe (proskynesis
Proskynesis

Proskynesis, formed from the Ancient Greek words pros and kuneo literally means "kissing towards", and refers to the traditional Persian Empire act of prostrating oneself before a person of higher social rank....
, p??s????s??). Circuses and basilicas were designed with to keep the face of the emperor perpetually in view, and always in a seat of authority. The emperor became a figure of transcendent authority, a man beyond the grip of the masses. His every appearance was stage-managed. This style of presentation was not new—many of its elements were first seen in the reigns of Aurelian and Severus—but it was only under the Tetrarchs that it was refined into an explicit system.

Legal

As with most emperors, much of Diocletian's daily routine rotated around legal affairs, responding to appeals and petitions, and delivering decisions. Rescripts, authoritative interpretations issued by the emperor in response to demands from disputants in both public and private cases, were a common duty of second- and third-century emperors. Diocletian was awash in paperwork, and was nearly incapable of delegating his duties. It would have been seen as a dereliction of duty to ignore them. Diocletian's praetorian prefects—Afranius Hannibalianus, Julius Asclepiodotus, and Flavius Constantius—aided in regulating the flow and presentation of such paperwork, but the deep legalism of Roman culture kept the workload heavy. Emperors in the forty years preceding Diocletian's reign had not managed these duties so effectively, and their output in attested rescripts is low. Diocletian, by contrast, was prodigious in his affairs: there are around 1,200 rescripts in his name still surviving, and these probably represent only a small portion of the total issue.

Under the governance of the jurist
Jurist

A jurist or jurisconsult is a professional who studies, develops, applies, or otherwise deals with the law. The term is widely used in American English, but in the United Kingdom and many Commonwealth of Nations countries it has only historical and specialist usage....
s Gregorius, Aurelius Arcadius Charisius, and Hermogenianus, the imperial government began issuing official books of precedent
Precedent

In common law Legal systems of the world, a precedent or authority is a legal case establishing a principle or rule that a court or other judicial body adopts when deciding subsequent cases with similar issues or facts....
, collecting and listing all the rescripts that had been issued from the reign of Hadrian
Hadrian

Publius Aelius Hadrianus , as emperor Imperator Caesar Divi Traiani filius Traianus Hadrianus Augustus, and Divus Hadrianus after his apotheosis, known as Hadrian in English language, was Roman Emperor of Roman Empire from AD 117 to 138, as well as a Stoicism and Epicureanism philosopher....
 (r. 117–38) to the reign of Diocletian. The Codex Gregorianus includes rescripts up to 292, which the Codex Hermogenianus updated with a comprehensive collection of rescripts issued by Diocletian in 293 and 294. The jurists themselves were generally conservative, and constantly looked to past Roman practice and theory for guidance. They were probably given a looser administrative structure than that imposed on the later compilers of the Codex Theodosianus
Codex Theodosianus

The Codex Theodosianus was a compilation of the Roman law of the Roman Empire under the Christian emperors since 312. A commission was established by Theodosius II in 429 and the compilation was published in the eastern half of the Roman Empire in 438....
 (438) and Codex Justinianus
Corpus Juris Civilis

The Corpus Juris Civilis is the modern name for a collection of fundamental works in jurisprudence, issued from 529 to 534 by order of Justinian I, Byzantine Emperors....
 (529). Their work lacked the rigid structuring of those later codes, and was not published in the name of the emperor, but in the names of its compilers. The compilers' codifications were a radical innovation, given the decentralized nature of the Roman legal system. There is a sharp increase in the number of edicts and rescripts produced under Diocletian's rule, a fact that has been read as evidence of the Diocletian's thoroughgoing effort to realign society on terms established by the imperial center.

After Diocletian's reform of the provinces, governors were often referred to by the name iudex, or judge
Judge

A judge, or arbiter of justice, is a lead official who presides over a court of law,which is operated by the local, state, and/or federal government....
. The governor became responsible for his decisions first to his immediate superiors, as well as to the more distant office of the emperor. It was most likely at this time that judicial records became verbatim accounts of what was said in trial, making it easier to determine bias or improper conduct on the part of the governor. With these records and the empire's universal right of appeal
Appeal

In law, an appeal is a process for requesting a formal change to an official decision.The specific procedures for appealing, including even whether there is a right of appeal from a particular type of decision, can vary greatly from country to country....
, imperial authorities probably had a great deal of power to enforce behavior standards for their judges. In spite of Diocletian's attempts at reform, the provincial restructuring was far from clear, especially when citizens appealed the decisions of their governors. Proconsuls, for example, were often both judges of first instance and appeal, and the governors of some provinces took appellant cases from their neighbors. It soon became impossible to avoid taking some cases to the emperor for arbitration and judgment. Diocletian's reign marks the end of the classical period of Roman law. Where Diocletian's system of rescripts shows an adherence to classical tradition, Constantine's law is full of Greek and eastern influences.

Economic


Legacy

The historian A.H.M. Jones observed that "It is perhaps Diocletian's greatest achievement that he reigned twenty-one years and then abdicated voluntarily, and spent the remaining years of his life in peaceful retirement." Diocletian was one of the few emperors of the third and fourth centuries to die naturally, and the first in the history of the empire to retire voluntarily. Once he retired, however, his Tetrarchic system collapsed. Without the guiding hand of Diocletian, the empire frequently broke into civil war. Only in 324, when Constantine alone emerged triumphant, did stability return. Under the Christian Constantine, Diocletian was maligned. Constantine's rule, however, validated Diocletian's achievements and the autocratic principle he represented: the borders remained secure, in spite of Constantine's large expenditure of forces during his civil wars; the bureaucratic transformation of Roman government was completed; and Constantine took Diocletian's court ceremonies and made them even more extravagant.

Constantine abandoned Diocletian's aim of preserving a stable silver coinage, and minted instead a new gold solidus. Diocletian's paganism was repudiated in favor of an imperially sponsored Christianity; his attempts at controlling prices ignored. But even Christianity became tied to the state structure of the Roman Empire in an autocratic way; Constantine claimed for himself the same close relationship with the Christian God as Diocletian had claimed with Jupiter. Most importantly, Diocletian's tax system was preserved and tightened. Aided by the new state machinery introduced by Diocletian, the Byzantine Empire
Byzantine Empire

Byzantine Empire and Eastern Roman Empire are conventional names used to describe the Roman Empire during the Middle Ages, centered on its capital of Constantinople....
 would last for over one thousand years after his death.

Citations

Chapters from The Cambridge Ancient History, Volume XII: The Crisis of Empire are marked with a "(CAH)".

Primary sources


Secondary sources


See also

  • 20,000 Martyrs of Nicomedia
    20,000 Martyrs of Nicomedia

    The 20,000 Martyrs of Nicomedia died during the rule of Emperors Diocletian and Maximian in the early fourth century. A number of those executed, men, women, and children died by capital punishment, others were burned alive according to accounts....
  • Dioclesian
    Dioclesian

    Dioclesian is a tragicomedy semi-opera in five acts by Henry Purcell to a libretto by Thomas Betterton based on the play The Prophetess , by John Fletcher and Philip Massinger, which in turn was based very loosely on the life of the Emperor Diocletian....
    , Henry Purcell
    Henry Purcell

    Henry Purcell...
    's 1690 tragicomic semi-opera, loosely based on the life of the historical Diocletian
  • Diocletian window
    Diocletian window

    Diocletian windows, also called thermal windows, are large semicircular windows which are usually divided into three lights by two vertical mullions....


External links

  • from the Catholic Encyclopedia
    Catholic Encyclopedia

    The Catholic Encyclopedia, also referred to today as the Old Catholic Encyclopedia, is an English language encyclopedia published by The Encyclopedia Press....
    .
  • , by Lars Brownworth
    Lars Brownworth

    Lars Brownworth, an author and former United States history and political science teacher at the Stony Brook School, is the creator of the top 50 podcast, ....
    . 15 minute audio lecture on Diocletian.
  • By Robert Adam, 1764. Plates made available by the University of Wisconsin Digital Collections Center. (N.B. "Spalatro" was a less used alternative form of "Spalato", the Italian name for Croatian "Split").