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Diocletian
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Gaius Aurelius Valerius Diocletianus (c. December 22, 244 – December 3, 311), born Diocles and commonly known as Diocletian , was Roman Emperor from November 20, 284 to May 1, 305. Born to a Dalmatian family of low status, he rose through the ranks of the military to become cavalry commander to the emperor Carus. After the deaths of Carus and his son Numerian on campaign in Persia, Diocletian was acclaimed emperor by the army.

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Gaius Aurelius Valerius Diocletianus (c. December 22, 244 – December 3, 311), born Diocles and commonly known as Diocletian , was Roman Emperor from November 20, 284 to May 1, 305. Born to a Dalmatian family of low status, he rose through the ranks of the military to become cavalry commander to the emperor Carus. After the deaths of Carus and his son Numerian on campaign in Persia, Diocletian was acclaimed emperor by the army. A brief confrontation with Carus' other surviving son Carinus at the Battle of the Margus removed the only other claimant to the title. With his ascension to power, he ended the Crisis of the Third Century, marking the difference between the classical world and the world of late antiquity. Diocletian appointed fellow-officer Maximian his Augustus, his senior co-emperor, in 285. He delegated further on March 1, 293, appointing Galerius and Constantius as Caesars, junior co-emperors. Under this "Tetrarchy", or "rule of four", each emperor would rule over a quarter-division of the empire. In campaigns against Sarmatian and Danubian tribes (285–90), the Alamanni (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 government in the history of the empire. He established new administrative centers in Nicomedia, Mediolanum, Antioch, and Trier, 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 (301), Diocletian's attempt to curb inflation 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 and Constantine, sons of Maximian and Constantius respectively. The Diocletianic Persecution (303–311), the empire's last, largest, and bloodiest official persecution of Christianity, 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 on the Dalmatian coast, tending to his vegetable gardens.
Early life
Diocletian was probably born near Salona in Dalmatia (Solin in modern Croatia), some time around 244. His parents named him Diocles, or possibly Diocles Valerius. The modern historian Timothy Barnes 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 or a freedman of the senator Anullinus, or even that Diocles was a freedman himself. The first forty years of his life are mostly obscure. The Byzantine chronicler Joannes Zonaras states that he was Dux Moesiae, a commander of forces on the lower Danube. 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 and Noricum proclaimed the praetorian prefect M. Aurelius Carus as emperor, beginning a rebellion against what had been the apparently secure government of the emperor Probus. Probus' army, stationed in Sirmium (Sremska Mitrovica, Serbia), 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 and Numerian 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 to the East, against the Sassanid Empire. The Sassanids had been embroiled in a succession dispute since the death of Shapur, and were in no position to oppose Carus' advance. According to Zonaras, Eutropius, and Festus, Carus won a major victory against the Persians, taking Seleucia and the Sassanid capital of Ctesiphon (near modern Al-Mada'in, Iraq), cities on opposite banks of the Tigris. In celebration, Carus and his sons took the title 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 in place of Carinus and Numerianus. Bassus was a member of a Campanian senatorial 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, Carinus' corrector Venetiae, took control of northern Italy and Pannonia after Diocletian's accession. He minted coins from the mint at Siscia (Sisak, 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. In the spring, some time before the end of May, his armies met Carinus' across the river Margus (Great Morava) in Moesia. In modern accounts, the site has been located between the Mons Aureus (Seone, west of Smederevo) and Viminacium, near modern Belgrade, 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, 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 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 and Marcomanni 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 (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.
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 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
Diocletian spent the spring of 293 traveling with Galerius from Sirmium to Byzantium (Istanbul, Turkey). 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 (Budapest, Hungary), Bononia (Vidin, Bulgaria), Ulcisia Vetera, Castra Florentium, Intercisa (Dunaújváros, Hungary), and Onagrinum (Begec, 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. 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 declared himself Augustus in July or August 297. Much of Egypt, including Alexandria, recognized his rule. Diocletian moved into Egypt to suppress him, first putting down rebels in the Thebaid 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 Aurelius Achilleus, 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 and Elephantine. In Nubia, he made peace with the Nobatae and Blemmyes tribes. Under the terms of the peace treaty Rome's borders moved north to Philae 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 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), Arzanene (Aghdznik), Corduene (Carduene), and Zabdicene (near modern Hakkâri, Turkey). These regions included the passage of the Tigris through the Anti-Taurus range; the Bitlis pass, the quickest southerly route into Persian Armenia; and access to the Tur Abdin plateau.
A stretch of land containing the later strategic strongholds of Amida (Diyarbakir, 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 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 and divination in an attempt to predict the future. The haruspices 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, Lactantius and Constantine 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, Diocletian ordered that the leading followers of Mani 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, Turkey) or the mines of Phaeno in southern Palestine. 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 Romanus of Caesarea 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 of Apollo at Didyma. 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 eunuchs of the palace. An investigation was commissioned, but no responsible party was found. Executions followed anyway, and the palace eunuchs Dorotheus and Gorgonius were executed. One individual, Peter, was stripped, raised high, and scourged. Salt and vinegar were poured in his wounds, and he was slowly boiled over an open flame. The executions continued until at least April 24, 303, when six individuals, including the bishop Anthimus, were decapitated. 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 martyrs' 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 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, the adversary of God.
Later life
Illness and abdication
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), 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 on January 1, 304 instead. There are suggestions in the Panegyrici Latini 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. 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 and Maximin 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 he had built on the Adriatic near the administrative center of Salona. Maximian retired to villas in Campania or Lucania. 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 (Petronell-Carnuntum, Austria). Diocletian and Maximian were both present on November 11, 308, to see Galerius appoint Licinius 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 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. 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. 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; 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, Arles, Sirmium, Serdica, Thessaloniki, Nicomedia, and Antioch—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 were abandoned for all but the Tetrarchs themselves. Diocletian took to wearing a gold crown and jewels, and forbade the use of purple cloth 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, 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 jurists Gregorius, Aurelius Arcadius Charisius, and Hermogenianus, the imperial government began issuing official books of precedent, collecting and listing all the rescripts that had been issued from the reign of Hadrian (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 (438) and Codex Justinianus (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. 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, 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 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
External links
- from the Catholic Encyclopedia.
- , by Lars Brownworth. 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").
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