# Licinius

Valerius Licinianus Licinius (/lɪˈsɪniəs/; Greek: Λικίνιος; c. 265 – 325) was Roman emperor from 308 to 324. For most of his reign, he was the colleague and rival of Constantine I, with whom he co-authored the Edict of Milan that granted official toleration to Christians in the Roman Empire. He was finally defeated at the Battle of Chrysopolis (AD 324), and was later executed on the orders of Constantine I.

## Early reign

Born to a Dacian peasant family in Moesia Superior, Licinius accompanied his close childhood friend and future emperor Galerius, on the Persian expedition in 298. He was trusted enough by Galerius that in 307 he was sent as an envoy to Italy, to attempt to reach some sort of agreement with the usurper Maxentius. When Galerius went to deal with Maxentius personally after the death of Severus II, he left the eastern provinces in Licinius' care.
Upon his return to the east Galerius elevated Licinius to the rank of Augustus in the West on 11 November 308, and under his immediate command were the Balkan provinces of Illyricum, Thrace and Pannonia. In 310 he took command of the war against the Sarmatians, inflicting a severe defeat on them. On the death of Galerius in May 311, Licinius entered into an agreement with Maximinus Daza to share the eastern provinces between them. By this point, not only was Licinius the official Augustus of the west but he also possessed part of the eastern provinces as well, as the Hellespont and the Bosporus became the dividing line, with Licinius taking the European provinces and Maximinus taking the Asian.
An alliance between Maximinus and Maxentius forced the two remaining emperors to enter into a formal agreement with each other. So, in March of 313, Licinius married Flavia Julia Constantia, half-sister of Constantine I, at Mediolanum (now Milan); they had a son, Licinius the Younger, in 315. Their marriage was the occasion for the jointly-issued "Edict of Milan" that reissued Galerius' previous edict allowing Christianity (and any religion one might choose) to be professed in the Empire, with additional dispositions that restored confiscated properties to Christian congregations and exempted Christian clergy from municipal civic duties. The redaction of the edict as reproduced by Lactantius – who follows the text affixed by Licinius in Nicomedia on 14 June 313, after Maximinus' defeat – uses neutral language, expressing a will to propitiate "any Divinity whatsoever in the seat of the heavens".
Daza in the meantime decided to attack Licinius. Leaving Syria with 70,000 men, he reached Bithynia, although the harsh weather he encountered along the way had gravely weakened his army. In April 313, he crossed the Bosporus and went to Byzantium, which was held by Licinius' troops. Undeterred, he took the town after an eleven-day siege. He moved to Heraclea, which he captured after a short siege, before moving his forces to the first posting station. With a much smaller body of men, possibly around 30,000, Licinius arrived at Adrianople while Daza was still besieging Heraclea. Before the decisive engagement, Licinius allegedly had a vision in which an angel recited him a generic prayer that could be adopted by all cults which Licinius then repeated to his soldiers. On 30 April 313, the two armies clashed at the Battle of Tzirallum, and Daza's forces were crushed. Daza escaped, disguised as a slave, and fled to Nicomedia, where he fortified the area around the Cilician Gates. Licinius' army broke through and Daza retreated to Tarsus, where Licinius continued to press him on land and sea. The war between them ended only with Daza's death in August 313.
Licinius sought out and killed multiple relatives of the Tetrarchs - Daza's wife and two children, Severus' son Flavius Severianus, Galerius' son Candidianus, Diocletian's wife Prisca, and Galeria Valeria, daughter of Diocletian and wife of Galerius.
Given that Constantine had already crushed his rival Maxentius in 312, the two men decided to divide the Roman world between them. As a result of this settlement, the Tetrarchy was replaced by a system of two emperors, called Augusti: Licinius became Augustus of the East, while his brother-in-law, Constantine, became Augustus of the West.
After making the pact, Licinius rushed immediately to the East to deal with another threat, an invasion by the Persian Sassanid Empire.

## Conflict with Constantine I

In 314, a civil war erupted between Licinius and Constantine, in which Constantine used the pretext that Licinius was harbouring Senecio, whom Constantine accused of plotting to overthrow him. Constantine prevailed at the Battle of Cibalae in Pannonia (8 October 314). Although the situation was temporarily settled, with both men sharing the consulship in 315, it was but a lull in the storm. The next year a new war erupted, when Licinius named Valerius Valens co-emperor, only for Licinius to suffer a humiliating defeat on the plains in the Battle of Mardia (also known as the Battle of Campus Ardiensis) in Thrace. The emperors were reconciled after these two battles and Licinius had his co-emperor Valens killed.
Over the next ten years, the two imperial colleagues maintained an uneasy truce. Licinius kept himself busy with a campaign against the Sarmatians in 318, but temperatures rose again in 321 when Constantine pursued some Sarmatians, who had been ravaging some territory in his realm, across the Danube into what was technically Licinius's territory. When he repeated this with another invasion, this time by the Goths who were pillaging Thrace under their leader Rausimod, Licinius complained that Constantine had broken the treaty between them.
Constantine wasted no time going on the offensive. Licinius's fleet of 350 ships was defeated by Constantine's fleet in 323. Then in 324, Constantine, tempted by the "advanced age and unpopular vices" of his colleague, again declared war against him and having defeated his army of 165,000 men at the Battle of Adrianople (3 July 324), succeeded in shutting him up within the walls of Byzantium. The defeat of the superior fleet of Licinius in the Battle of the Hellespont by Crispus, Constantine's eldest son and Caesar, compelled his withdrawal to Bithynia, where a last stand was made; the Battle of Chrysopolis, near Chalcedon (18 September), resulted in Licinius' final submission. In this conflict Licinius was supported by the Gothic prince Alica. Due to the intervention of Flavia Julia Constantia, Constantine's sister and also Licinius' wife, both Licinius and his co-emperor Martinian were initially spared, Licinius being imprisoned in Thessalonica, Martinian in Cappadocia; however, both former emperors were subsequently executed. After his defeat, Licinius attempted to regain power with Gothic support, but his plans were exposed, and he was sentenced to death. While attempting to flee to the Goths, Licinius was apprehended at Thessalonica. Constantine had him hanged, accusing him of conspiring to raise troops among the barbarians.

## Character and legacy

As part of Constantine's attempts to decrease Licinius's popularity, he actively portrayed his brother-in-law as a pagan supporter. This may not have been the case; contemporary evidence tends to suggest that he was at least a committed supporter of Christians at one point. He co-authored the Edict of Milan which ended the Great Persecution, and re-affirmed the rights of Christians in his half of the empire. He also added the Christian symbol to his armies, and attempted to regulate the affairs of the Church hierarchy just as Constantine and his successors were to do. His wife was a devout Christian.
It is possible that he converted. However, Eusebius of Caesarea, writing under the rule of Constantine, charges him with expelling Christians from the Palace and ordering military sacrifices to pagan gods, as well as interfering with the Church's internal procedures and organization. It has been theorized that he originally supported Christians along with Constantine, but later in his life turned against them and to paganism.
Finally, on Licinius's death, his memory was branded with infamy; his statues were thrown down; and by edict, all his laws and judicial proceedings during his reign were abolished. Such official erasure from the public record has come to be called damnatio memoriae.

## Family tree

vteSimplified family tree of Tetrarchs :
| | | | | | | | | | | DIOCLETIAN Iovius Western Emperor 286–305 | DIOCLETIAN Iovius Western Emperor 286–305 | DIOCLETIAN Iovius Western Emperor 286–305 | DIOCLETIAN Iovius Western Emperor 286–305 | DIOCLETIAN Iovius Western Emperor 286–305 | DIOCLETIAN Iovius Western Emperor 286–305 | | | Prisca | Prisca | Prisca | Prisca | Prisca | Prisca | | | | | | | Afranius Hannibalianus (disputed) consul 292 | Afranius Hannibalianus (disputed) consul 292 | Afranius Hannibalianus (disputed) consul 292 | Afranius Hannibalianus (disputed) consul 292 | Afranius Hannibalianus (disputed) consul 292 | Afranius Hannibalianus (disputed) consul 292 | | | Eutropia | Eutropia | Eutropia | Eutropia | Eutropia | Eutropia | Maximian Herculius Western Emperor 286–305 | Maximian Herculius Western Emperor 286–305 | Maximian Herculius Western Emperor 286–305 | Maximian Herculius Western Emperor 286–305 | Maximian Herculius Western Emperor 286–305 | Maximian Herculius Western Emperor 286–305 |
| Unknown sister | Unknown sister | Unknown sister | Unknown sister | Unknown sister | Unknown sister | Galerius Eastern Emperor 305-311 | Galerius Eastern Emperor 305-311 | Galerius Eastern Emperor 305-311 | Galerius Eastern Emperor 305-311 | Galerius Eastern Emperor 305-311 | Galerius Eastern Emperor 305-311 | | | Galeria Valeria | Galeria Valeria | Galeria Valeria | Galeria Valeria | Galeria Valeria | Galeria Valeria | | | | | | | | | | | Helena | Helena | Helena | Helena | Helena | Helena | | | Constantius I Western Emperor 305–306 Constantinian Dynasty | Constantius I Western Emperor 305–306 Constantinian Dynasty | Constantius I Western Emperor 305–306 Constantinian Dynasty | Constantius I Western Emperor 305–306 Constantinian Dynasty | Constantius I Western Emperor 305–306 Constantinian Dynasty | Constantius I Western Emperor 305–306 Constantinian Dynasty | Flavia Maximiana Theodora | Flavia Maximiana Theodora | Flavia Maximiana Theodora | Flavia Maximiana Theodora | Flavia Maximiana Theodora | Flavia Maximiana Theodora | | | Severus II Western Emperor 306–307 | Severus II Western Emperor 306–307 | Severus II Western Emperor 306–307 | Severus II Western Emperor 306–307 | Severus II Western Emperor 306–307 | Severus II Western Emperor 306–307 |
| Maximinus II Eastern Emperor 310–313 | Maximinus II Eastern Emperor 310–313 | Maximinus II Eastern Emperor 310–313 | Maximinus II Eastern Emperor 310–313 | Maximinus II Eastern Emperor 310–313 | Maximinus II Eastern Emperor 310–313 | | | | | Valeria Maximilla | Valeria Maximilla | Valeria Maximilla | Valeria Maximilla | Valeria Maximilla | Valeria Maximilla | | | Maxentius Western Emperor 306–312 | Maxentius Western Emperor 306–312 | Maxentius Western Emperor 306–312 | Maxentius Western Emperor 306–312 | Maxentius Western Emperor 306–312 | Maxentius Western Emperor 306–312 | | | Fausta | Fausta | Fausta | Fausta | Fausta | Fausta | | | Constantine I Roman Emperor 306–337 | Constantine I Roman Emperor 306–337 | Constantine I Roman Emperor 306–337 | Constantine I Roman Emperor 306–337 | Constantine I Roman Emperor 306–337 | Constantine I Roman Emperor 306–337 | | | | | Julius Constantius consul 335 | Julius Constantius consul 335 | Julius Constantius consul 335 | Julius Constantius consul 335 | Julius Constantius consul 335 | Julius Constantius consul 335 | Flavia Julia Constantia | Flavia Julia Constantia | Flavia Julia Constantia | Flavia Julia Constantia | Flavia Julia Constantia | Flavia Julia Constantia | | | Licinius I Eastern Emperor 308–324 | Licinius I Eastern Emperor 308–324 | Licinius I Eastern Emperor 308–324 | Licinius I Eastern Emperor 308–324 | Licinius I Eastern Emperor 308–324 | Licinius I Eastern Emperor 308–324 | Martinian Western Emperor 324 | Martinian Western Emperor 324 | Martinian Western Emperor 324 | Martinian Western Emperor 324 | Martinian Western Emperor 324 | Martinian Western Emperor 324 | Valens I Western Emperor 316–317 | Valens I Western Emperor 316–317 | Valens I Western Emperor 316–317 | Valens I Western Emperor 316–317 | Valens I Western Emperor 316–317 | Valens I Western Emperor 316–317 |
| | | | | | | | | | | | | | | Valerius Romulus | Valerius Romulus | Valerius Romulus | Valerius Romulus | Valerius Romulus | Valerius Romulus | | | Constantine II Emperor 337–340 | Constantine II Emperor 337–340 | Constantine II Emperor 337–340 | Constantine II Emperor 337–340 | Constantine II Emperor 337–340 | Constantine II Emperor 337–340 | | | Constantius II Emperor 337–361 | Constantius II Emperor 337–361 | Constantius II Emperor 337–361 | Constantius II Emperor 337–361 | Constantius II Emperor 337–361 | Constantius II Emperor 337–361 | | | Constans I Emperor 337–350 | Constans I Emperor 337–350 | Constans I Emperor 337–350 | Constans I Emperor 337–350 | Constans I Emperor 337–350 | Constans I Emperor 337–350 | Julian II Emperor 361–363 | Julian II Emperor 361–363 | Julian II Emperor 361–363 | Julian II Emperor 361–363 | Julian II Emperor 361–363 | Julian II Emperor 361–363 | | | | | Licinius II caesar | Licinius II caesar | Licinius II caesar | Licinius II caesar | Licinius II caesar | Licinius II caesar |
Notes:
↑ Timothy Barnes (New Empire, 33–34) questions the parentage of Theodora shown here. He proposes that Maximian is her natural father (and that her mother is possibly a daughter of Afranius Hannibalianus). Substituting Afranicus Hannibalianus and switching the positions of Maximian and Eutropia would produce a diagram that matches the alternative lineage.
Bibliography:
Barnes, Timothy D. The New Empire of Diocletian and Constantine. Cambridge, MA: Harvard University Press, 1982. ISBN 0-7837-2221-4 :