Battle of Milvian Bridge
Encyclopedia
The Battle of the Milvian Bridge took place between the Roman Emperor
Roman Emperor
The Roman emperor was the ruler of the Roman State during the imperial period . The Romans had no single term for the office although at any given time, a given title was associated with the emperor...

s Constantine I and Maxentius
Maxentius
Maxentius was a Roman Emperor from 306 to 312. He was the son of former Emperor Maximian, and the son-in-law of Emperor Galerius.-Birth and early life:Maxentius' exact date of birth is unknown; it was probably around 278...

 on 28 October 312. It takes its name from the Milvian Bridge, an important route over the Tiber
Tiber
The Tiber is the third-longest river in Italy, rising in the Apennine Mountains in Emilia-Romagna and flowing through Umbria and Lazio to the Tyrrhenian Sea. It drains a basin estimated at...

. Constantine won the battle and started on the path that led him to end the Tetrarchy
Tetrarchy
The term Tetrarchy describes any system of government where power is divided among four individuals, but usually refers to the tetrarchy instituted by Roman Emperor Diocletian in 293, marking the end of the Crisis of the Third Century and the recovery of the Roman Empire...

 and become the sole ruler of the Roman Empire
Roman Empire
The Roman Empire was the post-Republican period of the ancient Roman civilization, characterised by an autocratic form of government and large territorial holdings in Europe and around the Mediterranean....

. Maxentius drowned in the Tiber during the battle.

According to chroniclers such as Eusebius of Caesarea
Eusebius of Caesarea
Eusebius of Caesarea also called Eusebius Pamphili, was a Roman historian, exegete and Christian polemicist. He became the Bishop of Caesarea in Palestine about the year 314. Together with Pamphilus, he was a scholar of the Biblical canon...

 and Lactantius
Lactantius
Lucius Caecilius Firmianus Lactantius was an early Christian author who became an advisor to the first Christian Roman emperor, Constantine I, guiding his religious policy as it developed, and tutor to his son.-Biography:...

, the battle marked the beginning of Constantine's conversion to Christianity
Constantine I and Christianity
During the reign of the Emperor Constantine the Great, Christianity became the dominant religion of the Roman Empire. Constantine, also known as Constantine I, had a significant religious experience following his victory at the Battle of Milvian Bridge in 312...

. Lactantius recounts that Constantine and his soldiers had a vision of the Christian God promising victory if they daubed the sign of the cross on their shields. 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...

, erected in celebration of the victory, certainly attributes Constantine's success to divine intervention; however, the monument does not display any overtly Christian symbolism.

Historical background

The underlying causes of the battle were the rivalries inherent in Diocletian
Diocletian
Diocletian |latinized]] upon his accession to Diocletian . c. 22 December 244  – 3 December 311), was a Roman Emperor from 284 to 305....

's Tetrarchy. After Diocletian stepped down on 1 May 305, his successors began to struggle for control of the Roman Empire almost immediately. Although Constantine was the son of the western emperor Constantius
Constantius Chlorus
Constantius I , commonly known as Constantius Chlorus, was Roman Emperor from 293 to 306. He was the father of Constantine the Great and founder of the Constantinian dynasty. As Caesar he defeated the usurper Allectus in Britain and campaigned extensively along the Rhine frontier, defeating the...

, the Tetrarchic ideology did not necessarily provide for hereditary succession. When Constantius died on 25 July 306, his father's troops proclaimed Constantine as Augustus
Augustus (honorific)
Augustus , Latin for "majestic," "the increaser," or "venerable", was an Ancient Roman title, which was first held by Gaius Julius Caesar Augustus , and subsequently came to be considered one of the titles of what are now known as the Roman Emperors...

 in Eboracum
Eboracum
Eboracum was a fort and city in Roman Britain. The settlement evolved into York, located in North Yorkshire, England.-Etymology:The first known recorded mention of Eboracum by name is dated circa 95-104 AD and is an address containing the Latin form of the settlement's name, "Eburaci", on a wooden...

 (York
York
York is a walled city, situated at the confluence of the Rivers Ouse and Foss in North Yorkshire, England. The city has a rich heritage and has provided the backdrop to major political events throughout much of its two millennia of existence...

). In Rome, the favorite was Maxentius, the son of Constantius' imperial colleague Maximian
Maximian
Maximian was Roman Emperor from 286 to 305. He was Caesar from 285 to 286, then Augustus from 286 to 305. He shared the latter title with his co-emperor and superior, Diocletian, whose political brain complemented Maximian's military brawn. Maximian established his residence at Trier but spent...

, who seized the title of emperor on 28 October 306. But whereas Constantine's claim was recognized by Galerius
Galerius
Galerius , was Roman Emperor from 305 to 311. During his reign he campaigned, aided by Diocletian, against the Sassanid Empire, sacking their capital Ctesiphon in 299. He also campaigned across the Danube against the Carpi, defeating them in 297 and 300...

, ruler of the Eastern provinces and the senior emperor in the empire, Maxentius was treated as a usurper. Galerius sent his subordinate emperor, Severus
Flavius Valerius Severus
Severus , sometimes known as Severus II, was a Western Roman Emperor from 306 to 307.- Officer in the Roman army :Severus was of humble birth, born in the Illyrian provinces around the middle of the third century AD...

, against him in early 307. Once Severus arrived in Italy, however, his army defected to Maxentius. Severus was captured, imprisoned, and executed. Galerius himself marched on Rome in the autumn, but failed to take the city. Constantine avoided conflict with both Maxentius and the eastern emperors for most of this period.

By 312, however, Constantine and Maxentius were engaged in open hostility with one another, although they were brothers-in‑law through Constantine's marriage to Fausta
Fausta
Fausta Flavia Maxima was a Roman Empress, daughter of the Roman Emperor Maximianus. To seal the alliance between them for control of the Tetrarchy, in 307 Maximianus married her to Constantine I, who set aside his wife Minervina in her favour. Constantine and Fausta had been betrothed since...

, sister of Maxentius. In the spring of 312, Constantine gathered his forces and decided to oust Maxentius himself. He easily overran northern Italy, winning two major battles: the first near Turin
Battle of Turin (312)
The Battle of Turin was fought in 312 between Roman emperor Constantine and the troops of his rival augustus, Maxentius. Constantine won the battle, giving an impressive display of the tactical skill which was to characterise his whole military career...

, the second at Verona
Battle of Verona (312)
The Battle of Verona was fought in 312 between the forces of the Roman emperors Constantine I and Maxentius. Maxentius' forces were defeated, and Ruricius Pompeianus, the most senior Maxentian commander, was killed in the fighting.-Background:...

, where the praetorian prefect
Praetorian prefect
Praetorian prefect was the title of a high office in the Roman Empire. Originating as the commander of the Praetorian Guard, the office gradually acquired extensive legal and administrative functions, with its holders becoming the Emperor's chief aides...

 Ruricius Pompeianus
Ruricius Pompeianus
Ruricius Pompeianus was Praetorian prefect and Commander of cavalry and infantry under Maxentius, Western Roman Emperor. While guarding the Adige and Po Rivers with the ample and well-directed forces of the province of Venetia, Pompeianus was killed by Constantine I's troops during the desperately...

, Maxentius' most senior general, was killed.

Vision of Constantine

It is commonly stated that on the evening of 27 October with the armies preparing for battle, Constantine had a vision which led him to fight under the protection of the Christian God. The details of that vision, however, differ between the sources reporting it.

Lactantius states that, in the night before the battle, Constantine was commanded in a dream to "delineate the heavenly sign on the shields of his soldiers" (On the Deaths of the Persecutors 44.5). He followed the commands of his dream and marked the shields with a sign "denoting Christ". Lactantius describes that sign as a "staurogram", or a Latin cross
Christian cross
The Christian cross, seen as a representation of the instrument of the crucifixion of Jesus Christ, is the best-known religious symbol of Christianity...

 with its upper end rounded in a P-like fashion. There is no certain evidence that Constantine ever used that sign, opposed to the better known Chi-Rho sign described by Eusebius.
From Eusebius, two accounts of the battle survive. The first, shorter one in the Ecclesiastical History
Church History (Eusebius)
The Church History of Eusebius, the bishop of Caesarea was a 4th-century pioneer work giving a chronological account of the development of Early Christianity from the 1st century to the 4th century. It was written in Koine Greek, and survives also in Latin, Syriac and Armenian manuscripts...

promotes the belief that God helped Constantine but does not mention any vision. In his later Life of Constantine, Eusebius gives a detailed account of a vision and stresses that he had heard the story from the Emperor himself. According to this version, Constantine with his army was marching (Eusebius does not specify the actual location of the event, but it clearly is not in the camp at Rome), when he looked up to the sun and saw a cross of light above it, and with it the Greek words "Εν Τούτῳ Νίκα", En toutō níka, usually translated into Latin as "in hoc signo vinces
In hoc signo vinces
In hoc signo vinces is a Latin rendering of the Greek phrase "" en touto nika, and means "in this sign you will conquer"....

,
" both phrases have the literal meaning "In this sign,[you shall] conquer;" a more free translation would be "Through this sign [you shall] conquer". At first he was unsure of the meaning of the apparition, but in the following night he had a dream in which Christ explained to him that he should use the sign against his enemies. Eusebius then continues to describe the labarum
Labarum
The labarum was a vexillum that displayed the "Chi-Rho" symbol ☧, formed from the first two Greek letters of the word "Christ" — Chi and Rho . It was used by the Roman emperor Constantine I...

, the military standard used by Constantine in his later wars against Licinius
Licinius
Licinius I , was Roman Emperor from 308 to 324. Co-author of the Edict of Milan that granted official toleration to Christians in the Roman Empire, for the majority of his reign he was the rival of Constantine I...

, showing the Chi-Rho sign.

The accounts of the two contemporary authors, though not entirely consistent, have been merged into a popular notion of Constantine seeing the Chi-Rho sign on the evening before the battle. Both authors agree that the sign was not readily understandable to denote Christ, which corresponds to the fact that there is no certain evidence of the use of the letters chi and rho as a Christian sign before Constantine. Its first appearance is on a Constantinian silver coin from c. 317, which proves that Constantine did use the sign at that time, though not very prominently. He made extensive use of the Chi-Rho and the Labarum only later in the conflict with Licinius.

Some have interpreted the vision in a solar context (e.g., as a solar halo
Halo (optical phenomenon)
A halo from Greek ἅλως; also known as a nimbus, icebow or gloriole) is an optical phenomenon produced by ice crystals creating colored or white arcs and spots in the sky. Many are near the sun or moon but others are elsewhere and even in the opposite part of the sky...

 phenomenon), which may have been reshaped to fit with the Christian beliefs later expressed by Constantine. It is interesting to note that coins of Constantine depicting him quite overtly as the companion of a solar deity were minted as late as 313, the year following the battle. The solar diety, Sol Invictus
Sol Invictus
Sol Invictus was the official sun god of the later Roman empire. In 274 Aurelian made it an official cult alongside the traditional Roman cults. Scholars disagree whether the new deity was a refoundation of the ancient Latin cult of Sol, a revival of the cult of Elagabalus or completely new...

, is often pictured with a nimbus
Halo (religious iconography)
A halo is a ring of light that surrounds a person in art. They have been used in the iconography of many religions to indicate holy or sacred figures, and have at various periods also been used in images of rulers or heroes...

, or halo. Various emperors portrayed Sol Invictus on their official coinage, with a wide range of legends, only a few of which incorporated the epithet invictus, such as the legend SOLI INVICTO COMITI, claiming the Unconquered Sun as a companion to the Emperor, used with particular frequency by Constantine. Constantine's official coinage continues to bear images of Sol until 325/6. A solidus
Solidus (coin)
The solidus was originally a gold coin issued by the Romans, and a weight measure for gold more generally, corresponding to 4.5 grams.-Roman and Byzantine coinage:...

 of Constantine as well as a gold medallion from his reign depict the Emperor's bust in profile twinned ("jugate") with Sol Invictus, with the legend INVICTUS CONSTANTINUS. The official cults of Sol Invictus and Sol Invictus Mithras were popular amongst the soldiers of the Roman army. Statuettes of Sol Invictus, carried by the standard-bearers, appear in three places in reliefs 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...

. Constantine's triumphal arch was carefully positioned to align with the colossal statue of Sol
Colossus of Nero
The Colossus Neronis was an enormous, 30 m bronze statue that the Emperor Nero erected in the vestibule of his Domus Aurea, the imperial villa complex on the Palatine Hill. It was modified by Nero's successors into a statue of the sun god Sol Invictus. It is last mentioned in the 4th century AD...

 by the Colosseum
Colosseum
The Colosseum, or the Coliseum, originally the Flavian Amphitheatre , is an elliptical amphitheatre in the centre of the city of Rome, Italy, the largest ever built in the Roman Empire...

, so that Sol formed the dominant backdrop when seen from the direction of the main approach towards the arch.

Events of the battle

Constantine reached Rome at the end of October 312 approaching along the Via Flaminia
Via Flaminia
The Via Flaminia was an ancient Roman road leading from Rome over the Apennine Mountains to Ariminum on the coast of the Adriatic Sea, and due to the ruggedness of the mountains was the major option the Romans had for travel between Etruria, Latium and Campania and the Po Valley...

. He camped at the location of Malborghetto near 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. It is located on the right bank of the Tiber where the Via Tiberina leads away from the Via Flaminia and another road led off along...

, where remains of a Constantinian monument in honour of the occasion are still extant.

It was expected that Maxentius would remain within Rome and endure a siege, as he already had successfully employed this strategy during the invasions of Severus and Galerius. He had already brought large amounts of food to the city in preparation. Surprisingly, he decided otherwise and met Constantine in open battle. Ancient sources about the event attribute this decision either to divine intervention
Miracle
A miracle often denotes an event attributed to divine intervention. Alternatively, it may be an event attributed to a miracle worker, saint, or religious leader. A miracle is sometimes thought of as a perceptible interruption of the laws of nature. Others suggest that a god may work with the laws...

 (e.g., Lactantius, Eusebius) or superstition (e.g., Zosimus). They also note that the day of the battle was the same as the day of his accession (28 October), which was generally thought to be a good omen. Lactantius also reports that the populace supported Constantine with acclamations during circus games, although the reliability of his account is not clear.
Maxentius chose to make his stand in front of the Milvian Bridge, a stone bridge that carries the Via Flaminia
Via Flaminia
The Via Flaminia was an ancient Roman road leading from Rome over the Apennine Mountains to Ariminum on the coast of the Adriatic Sea, and due to the ruggedness of the mountains was the major option the Romans had for travel between Etruria, Latium and Campania and the Po Valley...

 road across the Tiber River into Rome (the bridge stands today at the same site, somewhat remodelled, named in Italian Ponte Milvio or sometimes Ponte Molle, soft bridge). Holding it was crucial if Maxentius was to keep his rival out of Rome, where the Senate
Roman Senate
The Senate of the Roman Republic was a political institution in the ancient Roman Republic, however, it was not an elected body, but one whose members were appointed by the consuls, and later by the censors. After a magistrate served his term in office, it usually was followed with automatic...

 would surely favour whoever held the city. As Maxentius had probably partially destroyed the bridge during his preparations for a siege, he had a wooden or pontoon bridge
Pontoon bridge
A pontoon bridge or floating bridge is a bridge that floats on water and in which barge- or boat-like pontoons support the bridge deck and its dynamic loads. While pontoon bridges are usually temporary structures, some are used for long periods of time...

 constructed to get his army across the river. The sources vary as to the nature of the bridge central to the events of the battle. Zosimus mentions it, vaguely, as being a wooden construction while others specify that it was a pontoon bridge; sources are also unclear as to whether the bridge was deliberately constructed as a collapsible trap for Constantine's forces or not.

The next day, the two armies clashed, and Constantine won a decisive victory. The dispositions of Maxentius may have been faulty as his troops seem to have been arrayed with the River Tiber too close to their rear, giving them little space to allow re-grouping in the event of their formations being forced to give ground. Already known as a skillful general, Constantine first launched his cavalry at the cavalry of Maxentius and broke them. Constantine's infantry then advanced, most of Maxentius's troops fought well but they began to be pushed back toward the Tiber; Maxentius decided to retreat and make another stand at Rome itself; but there was only one escape route, via the bridge. Constantine's men inflicted heavy losses on the retreating army. Finally, the temporary bridge set up alongside the Milvian Bridge, over which many of the troops were escaping, collapsed, and those men stranded on the north bank of the Tiber were either taken prisoner or killed. Maxentius' Praetorian Guard
Praetorian Guard
The Praetorian Guard was a force of bodyguards used by Roman Emperors. The title was already used during the Roman Republic for the guards of Roman generals, at least since the rise to prominence of the Scipio family around 275 BC...

 seem to have made a stubborn stand on the northern bank of the river. Maxentius was among the dead, having drowned in the river while trying to swim across it in a desperate bid to escape or, alternatively, he is described as having been thrown by his horse into the river. Lactantius describes the death of Maxentius in the following manner: "The bridge in his rear was broken down. At sight of that the battle grew hotter. The hand of the Lord prevailed, and the forces of Maxentius were routed. He fled towards the broken bridge; but the multitude pressing on him, he was driven headlong into the Tiber."

Aftermath

Constantine entered Rome on 29 October. He staged a grand adventus in the city, and was met with popular jubilation. Maxentius' body was fished out of the Tiber and decapitated. His head was paraded through the streets for all to see. After the ceremonies, Maxentius' disembodied head was sent to Carthage
Carthage
Carthage , implying it was a 'new Tyre') is a major urban centre that has existed for nearly 3,000 years on the Gulf of Tunis, developing from a Phoenician colony of the 1st millennium BC...

 as proof of his downfall, Africa then offered no further resistance. The battle gave Constantine undisputed control of the western half of the Roman Empire. The descriptions of Constantine's entry into Rome omit mention of him ending his procession at the temple of Capitoline Jupiter, where sacrifice was usually offered. Though often employed to show Constantine's Christian sensibilities, this silence cannot be taken as proof that Constantine was a Christian at this point. He chose to honor the Senatorial
Roman Senate
The Senate of the Roman Republic was a political institution in the ancient Roman Republic, however, it was not an elected body, but one whose members were appointed by the consuls, and later by the censors. After a magistrate served his term in office, it usually was followed with automatic...

 Curia
Curia Julia
The Curia Hostilia was one of the original senate houses or 'curia' of the Roman Republic. It is believed to have begun as an Etruscan temple where the warring tribes laid down their arms during the reign of Romulus . During the early kingdom, the temple was for the use of the Senators who acted as...

 with a visit, where he promised to restore its ancestral privileges and give it a secure role in his reformed government: there would be no revenge against Maxentius' supporters. Maxentius was condemned to damnatio memoriae
Damnatio memoriae
Damnatio memoriae is the Latin phrase literally meaning "condemnation of memory" in the sense of a judgment that a person must not be remembered. It was a form of dishonor that could be passed by the Roman Senate upon traitors or others who brought discredit to the Roman State...

, all his legislation was invalidated and Constantine usurped all of Maxentius' considerable building projects within Rome, including the Temple of Romulus and the Basilica of Maxentius
Basilica of Maxentius
The Basilica of Maxentius and Constantine is an ancient building in the Roman Forum, Rome, Italy...

. Maxentius' strongest supporters in the military were neutralized when the Praetorian Guard
Praetorian Guard
The Praetorian Guard was a force of bodyguards used by Roman Emperors. The title was already used during the Roman Republic for the guards of Roman generals, at least since the rise to prominence of the Scipio family around 275 BC...

 and Imperial Horse Guard (equites singulares) were disbanded. Constantine is thought to have replaced the former imperial guards with a number of cavalry units termed the Scholae Palatinae
Scholae Palatinae
The Scholae Palatinae , were an elite military guard unit, usually ascribed to the Roman Emperor Constantine the Great as a replacement for the equites singulares Augusti, the cavalry arm of the Praetorian Guard...

.

Significance

Paul K. Davis writes, "Constantine’s victory gave him total control of the Western Roman Empire, paving the way for Christianity to become the dominant religion for the Roman Empire and ultimately for Europe."

External links

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