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Labarum



 
 
For the article about the "PX" symbol see Chi Rho
Chi Rho

The Chi Rho is one of the earliest christograms used by Christians. It is formed by superimposing the first two letters in the Greek spelling of the word Christ , chi = ch and rho = r, in such a way to produce the monogram ?....


The Labarum was a typographic ligature formed from Chi (?
?

or is a letter derived from the Latin alphabet. Both glyphs of the majuscule and Lower case forms of this letter are based on the rotated form of a minuscule e; a similar letter with identical minuscule is used in the Pan-Nigerian Alphabet, but has the capital form majuscule , based on a horizontally flipped majuscule E....
) and Rho (?
?

or is a letter derived from the Latin alphabet. Both glyphs of the majuscule and Lower case forms of this letter are based on the rotated form of a minuscule e; a similar letter with identical minuscule is used in the Pan-Nigerian Alphabet, but has the capital form majuscule , based on a horizontally flipped majuscule E....
), which had particular symbolic significance to the Roman
Roman Empire

The Roman Empire was the Roman Republic phase of the Ancient Rome, characterised by an autocracy form of government and large territorial holdings in Europe and around the Mediterranean....
s, Greeks
Ancient Greece

The term Ancient Greece refers to the period of History of Greece lasting from the Greek Dark Ages ca. 1100 BC and the Dorian invasion, to 146 BC and the Roman Republic conquest of Greece after the Battle of Corinth ....
, and to the Christians
Christianity

Christianity is a Monotheistic religion #Christian view religion centered on the life and teachings of Jesus as New Testament view on Jesus' life....
 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...
 in general.

It originated as a marginal note added to oracular texts by Greek scribes, to mark a particularly valuable or relevant passage; the combined letters Chi and Rho standing for chreston, meaning good.






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For the article about the "PX" symbol see Chi Rho
Chi Rho

The Chi Rho is one of the earliest christograms used by Christians. It is formed by superimposing the first two letters in the Greek spelling of the word Christ , chi = ch and rho = r, in such a way to produce the monogram ?....


The Labarum was a typographic ligature formed from Chi (?
?

or is a letter derived from the Latin alphabet. Both glyphs of the majuscule and Lower case forms of this letter are based on the rotated form of a minuscule e; a similar letter with identical minuscule is used in the Pan-Nigerian Alphabet, but has the capital form majuscule , based on a horizontally flipped majuscule E....
) and Rho (?
?

or is a letter derived from the Latin alphabet. Both glyphs of the majuscule and Lower case forms of this letter are based on the rotated form of a minuscule e; a similar letter with identical minuscule is used in the Pan-Nigerian Alphabet, but has the capital form majuscule , based on a horizontally flipped majuscule E....
), which had particular symbolic significance to the Roman
Roman Empire

The Roman Empire was the Roman Republic phase of the Ancient Rome, characterised by an autocracy form of government and large territorial holdings in Europe and around the Mediterranean....
s, Greeks
Ancient Greece

The term Ancient Greece refers to the period of History of Greece lasting from the Greek Dark Ages ca. 1100 BC and the Dorian invasion, to 146 BC and the Roman Republic conquest of Greece after the Battle of Corinth ....
, and to the Christians
Christianity

Christianity is a Monotheistic religion #Christian view religion centered on the life and teachings of Jesus as New Testament view on Jesus' life....
 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...
 in general.

It originated as a marginal note added to oracular texts by Greek scribes, to mark a particularly valuable or relevant passage; the combined letters Chi and Rho standing for chreston, meaning good. It was later used on the 3rd Century BC coinage of Ptolemy III Euergetes
Ptolemy III Euergetes

Ptolemy III Euergetes, was the third ruler of the Ptolemaic dynasty in Egypt. He was the eldest son of Ptolemy II Philadelphus and his first wife, Arsinoe I, and came to power in 246 BCE upon the death of his father....
 (between an eagle's feet), that of the 3rd century AD Roman Emporer Decius
Decius

Gaius Messius Quintus Decius was the Roman Emperors from 249 - 251. In the last year of his reign, he co-ruled with his son Herennius Etruscus until both of them were killed in the Battle of Abrittus....
, and as a vexillum
Vexillum

The vexillum was a flag-like object used in the Classical Era of the Roman Empire. The word is itself a diminutive for the Latin word, velum, sail, which confirms the historical evidence that vexilla were literally "little sails" i.e....
 (military standard) by Constantine I and several subsequent emporers. Christians also used the symbol to represent the first two Greek letters
Greek alphabet

The Greek alphabet is a set of twenty-four letters that has been used to write the Greek language since the late 9th century BC or early 8th century BCE....
 of the word Christ
Christ

Christ is the English language term for the Greek meaning "the anointing", which is a title given to the Reigning Messiah in the given age of the Zodiac....
 (or ???st??).

Despite the Imperial use of the symbol by Decius, who heavily persecuted Christians, and earlier pre-Christian usages, later Christian writers argued that Constantine used the symbol to represent his Christian allegiance. Constantine's actual religious affiliation is disputed, and his reasons for using the symbol could equally be based on the scribal meaning of auspicious, or deliberately choosing a symbol with a meaning ambiguous between the two.

The etymology of the word labarum is unclear; it is perhaps to be derived from Latin /labare/ 'to totter, to waver' (in the sense of the "waving" of a flag in the breeze).

Christian accounts of Constantine's adoption of the Chi-Rho


As Constantine Xr Ric Vii 019
According to Lactantius
Lactantius

Lucius Caelius Firmianus Lactantius was an early Christian author ....
, a historian of North African origin saved from poverty under the patronage of Constantine ? as tutor to his son Crispus
Crispus

Flavius Julius Crispus, also known as Flavius Claudius Crispus and Flavius Valerius Crispus was a Caesar of the Roman Empire. He was the first-born son of Constantine I and Minervina....
, who was writing in Latin, Constantine had dreamt of being ordered to put a "heavenly divine symbol" (Latin: coeleste signum dei) on the shield of his soldiers. The description of the actual symbol chosen by Costantine the next morning, as reported by Lactantius, is not very clear: it closely resembles a Chi Rho or a staurogram, a similar christian symbol. That very day Costantine army fought the forces 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 won the Battle of the Milvian Bridge (312), outside Rome.

Writing in Greek, Eusebius of Caesarea
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_....
 (died in 339), the bishop who wrote the first surviving general history of the early Christian churches, gave two different accounts of the events. In his church history, written shortly after the battle, when Eusebius didn't yet have any contact with Constantine, he doesn't mention any dream or vision, but compares the defeat of Maxentius (drowned in the Tiber
Tiber

The Tiber is the third-longest river in Italy, rising in the Apennine mountains in Emilia-Romagna and flowing 406 kilometres through Umbria and Lazio to the Tyrrhenian Sea....
) to that of the biblical pharaoh
Pharaoh

Pharaoh is a title used in many modern discussions of the ancient Egyptian rulers of all periods. In antiquity this title began to be used for the ruler who was the religious and political leader of united ancient Egypt, only during the New Kingdom, specifically, during the middle of the Eighteenth dynasty of Egypt....
 and credits Constantine victory to divine protection.

In a memoir of the emperor that Eusebius wrote after Constantine's death (On the Life of Constantine, ca 337-339), a miraculous appearance came in Gaul
Gaul

Gaul is the name used for the region of Western Europe comprising part of present day northern Italy, France, Belgium, western Switzerland and the parts of the Netherlands and Germany on the west bank of the River Rhine....
 long before the Milvian Bridge battle. In this later version, the emperor had been pondering the misfortunes that befall commanders that invoke the help of many different gods, and decided to seek divine aid in the forthcoming battle from the One God. At noon Constantine saw a cross of light imposed over the sun. Attached to it, in Greek characters, was the saying "???t? ???a!" . Not only Constantine, but the whole army saw the miracle. That night Christ appeared to the emperor in a dream and told him to make a replica of the sign he had seen in the sky, which would be a sure defense in battle.

Eusebius wrote in the Vita that Constantine himself had told him this story "and confirmed it with oaths," late in life "when I was deemed worthy of his acquaintance and company." "Indeed," says Eusebius, "had anyone else told this story, it would not have been easy to accept it." As Constantine during his last few years enjoyed be considered in direct contact with God , it is likely that the story should be credited to Constantine, rather than to Eusebius.

Eusebius' description of the Labarum


"A Description of the Standard of the Cross, which the Romans now call the Labarum." "Now it was made in the following manner. A long spear, overlaid with gold, formed the figure of the cross by means of a transverse bar laid over it. On the top of the whole was fixed a wreath of gold and precious stones; and within this, the symbol of the Saviour’s name, two letters indicating the name of Christ by means of its initial characters, the letter P being intersected by X in its centre: and these letters the emperor was in the habit of wearing on his helmet at a later period. From the cross-bar of the spear was suspended a cloth, a royal piece, covered with a profuse embroidery of most brilliant precious stones; and which, being also richly interlaced with gold, presented an indescribable degree of beauty to the beholder. This banner was of a square form, and the upright staff, whose lower section was of great length, of the pious emperor and his children on its upper part, beneath the trophy of the cross, and immediately above the embroidered banner."

"The emperor constantly made use of this sign of salvation as a safeguard against every adverse and hostile power, and commanded that others similar to it should be carried at the head of all his armies."

Modern interpretations of Constantine's vision

Constantine's modern biographer, Ramsay MacMullen
Ramsay MacMullen

Ramsay MacMullen is an Emeritus Professor of history at Yale University, where he taught from 1967 to his retirement in 1993 as Dunham Professor of History and Classics....
, is one who finds Constantine dream, as reported by Eusebius, not easy to accept: "If the sky writing was witnessed by 40,000 men, the true miracle lies in their unbroken silence about it".

There are numerous modern astronomical and astrological theories that defend Eusebius' account as possible. In 1948 Fritz Heiland, of the Zeiss planetarium at Jena, published his astronomical interpretation of Constantine's vision, that the fall of the year 312 was attended by an unusual spectacle: the syzygy
Syzygy

In broadest terms, Syzygy is a kind of unity, especially through coordination or alignment, most commonly used in the astronomical and/or astrological sense....
 or close alignment of three bright planets, Mars, Saturn and Jupiter, in the evening sky above the southwest horizon, positioned along a line within about 20 degrees of each other on the border of Capricorn and Sagittarius. Heiland suggests that Constantine overcame the psychological impact on his army, of the ill pagan content of the astrological omen that associated syzygies with bad outcomes, by appropriating it to fashion a Christian token of victory in the form of the labarum.

The Swedish geologist Jens Ormo and co-authors suggest that the account may have had its origins in Constantine's witnessing the daylight effects of a meteorite
Meteorite

A meteorite is a natural object originating in outer space that survives an impact with the Earth's surface. While in space it is called a meteoroid....
's descent through earth's atmosphere, of which the impact he believes resulted in the Sirente crater
Sirente crater

The Sirente crater is a small shallow seasonal lake in Abruzzo, central Italy. The lake is located at the center of a mountainous highland north of the Sirente massif in the Apennine Mountains and is 13 kilometres from the small village of Secinaro....
 situated in Sirente-Velino Regional Park, Abruzzo
Abruzzo

Abruzzo is a region in Italy, its western border lies less than 50 miles due east of Rome. Abruzzo borders the region of Marche to the north, Lazio to the west and south-west, Molise to the south-east, and the Adriatic Sea to the east....
, 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....


Celestial chi

Though modern representations of the chi-rho sign represent the two lines crossing at ninety degree angles, the early examples of the Chi-Rho cross at an angle that is more vividly representative of the chi formed by the solar ecliptic path
Ecliptic

The ecliptic is the apparent path that the Sun traces out in the sky during the year. As it appears to move in the sky in relation to the stars, the apparent path aligns with the planets throughout the course of the year....
 and the celestial equator
Celestial equator

The celestial equator is a great circle on the imaginary celestial sphere, in the same plane as the Earth's equator. In other words, it is a projection of the terrestrial equator out into space....
. This image is most familiar in Plato
Plato

Plato , was a Classical Greece Greeks philosopher, mathematician, writer of philosophical dialogues, and founder of the Platonic Academy in Ancient Athens, the first institution of higher learning in the western world....
's Timaeus
Timaeus

Timaeus is a Greek name, meaning "Honour". It may refer to:*Timaeus , a Socratic dialogue by Plato*Timaeus of Locri, the 5th-century Pythagorean philosopher, appearing in Plato's dialogue...
, where it is explained that the two bands which form the world soul (anima mundi
Anima mundi (spirit)

World soul is a pure ethereal spirit, which was proclaimed by some ancient philosophers to be diffused throughout all nature. It was thought to animate all matter in the same sense in which the soul was thought to animate the human....
) cross each other like the letter chi. Not only did the two legs of the chi remind early Christians of the Cross, "it reminded them of the mystery of the pre-existent Christ, the Logos Theou, the Word of God, who extended himself through all things in order to establish peace and harmony in the universe," in Robert Grigg's words. Hugo Rahner summarized the significance:
"The two great circle
Great circle

A great circle of a sphere is a circle that runs along the surface of that sphere so as to cut it into two equal halves. The great circle therefore has both the same circumference and the same center as the sphere....
s of the heavens, the equator and the ecliptic, which, by intersecting each other form a sort of recumbent chi and about which the whole dome of the starry heavens swings in a wondrous rhythm, became for the Christian eye a heavenly cross." Of Plato's image in Timaeus, Justin Martyr
Justin Martyr

Saint Justin Martyr was an early Christian apologetics and saint. His works represent the earliest surviving Christian "apologies" of notable size....
, the Christian apologist writing in the second century, found a prefiguration of the Cross, and an early testimony may be the phrase in Didache
Didache

The Didache is the common name of a brief Early Christianity treatise . It is an anonymous work not belonging to any single individual, and a pastoral manual "that reveals more about how Jewish Christianity saw themselves and how they adapted their Judaism for gentiles than any other book in the Christian Scriptures." The text, parts of whic...
, "sign of extension in heaven" (semeion ekpetaseosen ourano).


Iconographic career under Constantine

Among a number of standards depicted on the Arch of Constantine
Arch of Constantine

The Arch of Constantine is a triumphal arch in Rome, situated between the Colosseum and the Palatine Hill. It was erected to commemorate Constantine I's victory over Maxentius at the Battle of Milvian Bridge on October 28, 312....
, which was erected, largely with fragments from older monuments, just three years after the battle, the labarum does not appear. A grand opportunity for just the kind of political propaganda that the Arch otherwise was expressly built to present, was missed, if Eusebius' oath-confirmed account can be trusted, although it can be argued that, in the early years after the battle, the emperor still had not decided to give clear public support to Christianity, whether for lack of personal faith or in fear of religious friction. The arches' inscription does say that the Emperor had saved the res publica
Res publica

Res publica is a Latin phrase, literally meaning "public issue" or "public matter". It is the origin of the word 'republic', though translations vary widely according to the context....
 INSTINCTV DIVINITATIS MENTIS MAGNITVDINE ("by greatness of mind and by instinct [or impulse] of divinity"). As with his predecessors, the sun symbol - interpreted as Sol Invictus
Sol Invictus

Sol Invictus was the Roman official religion sun god created by the emperor Aurelian in 274 and continued, overshadowing other Eastern cults in importance, until the abolition of paganism under Theodosius I....
 (the Unconquered Sun) or also as 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....
 or Mithras — is inscribed on his coinage, but in 325 and thereafter the coinage ceases to be explicitly pagan, and Sol Invictus disappears. In his Historia Ecclesiae
Church History (Eusebius)

The Church History of Eusebius of Caesarea was a fourth-century pioneer work giving a chronological account of the development of Christianity from the first century....
 Eusebius further reports that, after his victorious entry into Rome, Constantine had a statue of himself erected, "holding the sign of the Savior [the cross] in his right hand." There are no other reports to confirm such a monument.

Whether Constantine I was the first Christian
Christian

A Christian is a person who adheres to Christianity, a Monotheism#Christian view religion centered on the life and teachings of Jesus and interpreted by Christians to have been prophesied in the Hebrew Bible/Old Testament....
 emperor supporting during his rule a peaceful transition to Christianity or an undecided pagan believer until middle age, strongly influenced in his political-religious decisions by his Christian mother St. Helena
Helena of Constantinople

Saint Helena also known as Saint Helen, Helena Augusta or Helena of Constantinople was the consort of Roman Emperor Constantius Chlorus, and the mother of Emperor Constantine I....
 is still in dispute among historians.

Maiorina Vetranio Siscia Ric 281
Double Centenionalis Magnentius Xr S4017
As for the Labarum itself, there is little evidence for its use before 317. In the course of Constantine's second war against Licinius, in 324, the latter developed a superstitious dread of Constantine's standard. During the attack of Constantine's troops at the Battle of Adrianople
Battle of Adrianople (324)

The Battle of Adrianople was fought on July 3, 324 during a Roman civil war, the second to be waged between the two Roman emperor Constantine I and Licinius; Licinius suffered a heavy defeat....
 the guard of the Labarum standard were directed to move it to any part of the field where his soldiers seemed to be faltering. The appearance of this talismanic object appeared to embolden Constantine's troops and dismay those of Licinius. At the final battle of the war, the Battle of Chrysopolis
Battle of Chrysopolis

The Battle of Chrysopolis was fought on 18 September 324 in Chrysopolis , near Chalcedon , between the two Roman emperors Constantine I and Licinius....
, Licinius, though prominently displaying the images of Rome's pagan pantheon on his own battle line, forbade his troops from actively attacking the Labarum, or even looking at it directly.

The usurper Magnentius
Magnentius

Flavius Magnus Magnentius was a Roman usurper .Born in Samarobriva , Gaul, Magnentius was the commander of the Herculians and Iovians, the imperial guard units ....
 appears to have been the first to use the Chi-Rho monogram flanked by Alpha and Omega, on the reverse of some coins minted in 353. In Roman Britannia, a tesselated mosaic pavement was uncovered at Hinton St Mary
Hinton St Mary Mosaic

The Hinton St Mary Mosaic is a large almost complete Roman Britain mosaic discovered at Hinton St Mary in the England county of Dorset. It appears to feature a portrait Bust of Jesus as its central Motif ....
, Dorset, in 1963:. On stylistic grounds it is dated to the fourth century; its central roundel represents a beardless male head and bust draped in a pallium
Pallium

The Pallium or Pall is an ecclesiastical vestment in the Roman Catholic Church, originally peculiar to the Pope, but for many centuries bestowed by him on metropolitan bishops and primate s as a symbol of the jurisdiction delegated to them by the Holy See....
 in front of the Chi-Rho symbol, flanked by pomegranate
Pomegranate

The pomegranate is a fruit-bearing deciduous shrub or small tree growing to between five and eight metres tall. The pomegranate is native to the region from Iran to the Himalayas in northern India and has been cultivated and naturalized over the whole Mediterranean Basin region and the Caucasus since ancient times....
s, symbols of eternal life.

Meister Von San Vitale in Ravenna 003
"Labarum" is also used for any ecclesiastical banner, such as those carried around in processions as well as under the name "the holy lavaro" for the set of early national Greek flags, blessed by the Greek Orthodox Church, under which the Greeks united, from the commencement and throughout the Greek Revolution (1821) against the Ottoman Empire, which was occupying Greece
Greece

Greece , officially the Hellenic Republic , is a country in southeastern Europe, situated on the southern end of the Balkans. It has borders with Albania, Bulgaria and the former Yugoslav Republic of Macedonia to the north, and Turkey to the east....
 at the time.

It also gives the name (Labaro
Lábaro

The L?baro is a modern interpretation of an ancient military standard of the Cantabri people from pre-Roman Iberum. It consists of a purple cloth on which there is what would be called in heraldry a "saltire voided throughout" made up of curved lines, with knobs at the end of each line....
) to a suburb of Rome
Rome

Rome is the capital city of Italy and Lazio, and is Italy's largest and most populous city, with 2,724,347 residents in an urban area of some ....
 adjacent to Prima Porta
Prima Porta

Prima Porta is a suburb of Rome located 12 kilometres north of its center along the Via Flaminia and just a kilometre outside of the Grande Raccordo Anulare highway....
, one of the sites where the appearance of this symbol is placed.

See also

  • Battle of Adrianople (324)
    Battle of Adrianople (324)

    The Battle of Adrianople was fought on July 3, 324 during a Roman civil war, the second to be waged between the two Roman emperor Constantine I and Licinius; Licinius suffered a heavy defeat....
  • Battle of Chrysopolis
    Battle of Chrysopolis

    The Battle of Chrysopolis was fought on 18 September 324 in Chrysopolis , near Chalcedon , between the two Roman emperors Constantine I and Licinius....
  • Labrys
    Labrys

    Labrys is the term for a symmetrical doubleheaded axe, known to the Classical Greeks as pelekus or sagaris, and to the Romans as a bipennis....
  • Christian symbolism
    Christian symbolism

    Christian symbolism invests objects or actions with an inner meaning expressing Christian ideas. Christianity has borrowed from the common stock of significant symbols known to most periods and to all regions of the world....
  • Christogram
    Christogram

    A Christogram is a monogram or combination of letters that forms an abbreviation for the name of Jesus Christ, traditionally used as a Christian symbolism....
  • Constantine I and Christianity
    Constantine I and Christianity

    Constantine I, Roman Emperor adopted Christianity following his victory in the Battle of Milvian Bridge 312. Under his rule, Christianity rose to become the dominant religion in the Roman Empire, and for his example of a "Christian monarch" Constantine is revered as a saint in the Eastern Orthodox Church....
  • Lábaro
    Lábaro

    The L?baro is a modern interpretation of an ancient military standard of the Cantabri people from pre-Roman Iberum. It consists of a purple cloth on which there is what would be called in heraldry a "saltire voided throughout" made up of curved lines, with knobs at the end of each line....
  • Ammianus Marcellinus
    Ammianus Marcellinus

    Ammianus Marcellinus was a fourth-century Ancient Rome historian. His is the last major historical account of the late Roman empire which survives today....
  • Arch of Constantine
    Arch of Constantine

    The Arch of Constantine is a triumphal arch in Rome, situated between the Colosseum and the Palatine Hill. It was erected to commemorate Constantine I's victory over Maxentius at the Battle of Milvian Bridge on October 28, 312....
    , triumphal arch
    Triumphal arch

    A triumphal arch is a structure in the shape of a monumental arch, in theory built to celebrate a victory in war, actually used to celebrate a ruler....
     to the victory at Milvian Bridge
    Battle of Milvian Bridge

    The Battle of the Milvian Bridge took place between the Roman Emperors Constantine I and Maxentius on October 28, 312. Constantine won the battle and started on the path that led him to end the Tetrarchy and become the sole ruler of the Roman Empire....
    .
  • 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....
  • Constantinian shift
    Constantinian shift

    Constantinian shift is a term used by Anabaptist and Post-Christendom theologians to describe the political and theological aspects of the 4th century process of Constantine I and Christianity....
  • Chi Rho
    Chi Rho

    The Chi Rho is one of the earliest christograms used by Christians. It is formed by superimposing the first two letters in the Greek spelling of the word Christ , chi = ch and rho = r, in such a way to produce the monogram ?....
  • The name of the Basque swastika
    Swastika

    The swastika is an equilateral cross with its arms bent at Angle#Types of angles, in either right-facing form or its mirrored left-facing form....
     lauburu
    Lauburu

    The lauburu or Basque cross has four comma -shaped heads similar to the Japanese tomoe. It can be constructed with a compass and straightedge, beginning with the formation of a square template; each head can be drawn from a neighboring vertex of this template with two compass settings, with one radius half the length of the other....
     (which can also be interpreted as "four heads") may come through a folk etymology from labarum.


Further reading

  • Grabar, Christian Iconography: A Study of its Origins ((Princeton University Press) 1968:165ff
  • Grant, Michael (1993), The Emperor Constantine, London. ISBN 0-75380-5286
  • R. Grosse, "Labarum", Realencyclopädie der klassischen Altertumswissenschaft vol. 12, pt 1(Stuttgart) 1924:240-42.
  • H. Grégoire, "L'étymologie de 'Labarum'" Byzantion 4 (1929:477-82).
  • A. Lipinsky, "Labarum" Lexikon der christlichen Ikonographie 3 (Rome:1970)
  • Odahl, C.M., (2004) Constantine and the Christian Empire, Routledge 2004. ISBN 0415174856
  • Smith, J.H., (1971) Constantine the Great, Hamilton, ISBN 0684123916