Sebastianus
Who was Sebastianus?
5th-century Roman usurper
Biographical data adapted from Wikipedia’s article on Sebastianus (CC BY-SA 4.0).
Biography
Sebastianus was a Roman usurper who ruled as co-emperor in southern Gaul from 412 to 413 CE, a particularly chaotic time for the Western Roman Empire. He was born in Narbonne to a noble Gallic family and was the brother of Jovinus, another well-known usurper who helped him gain power. The early 5th century was a time when many challenged imperial authority as barbarian groups moved into Roman lands and local leaders took control of different provinces.
In 411 CE, Jovinus successfully took the throne from Western Roman Emperor Honorius in Gaul, becoming a rival claimant to imperial power. In 412, Jovinus promoted his brother Sebastianus to the role of Augustus, making him co-emperor and sharing control over their territories in Gaul. Usurpers often used this tactic to legitimize their rule and ensure family involvement in governance. During his short reign, Sebastianus exercised imperial powers, with coins featuring his image and titles minted in Arles and Trier, showing his recognized authority there.
The rule of the brothers relied heavily on alliances with various barbarian groups, especially the Visigoths under King Ataulf. However, relations soured between Jovinus and Ataulf, leading to conflict with their former Gothic allies. This rift proved disastrous for Sebastianus and Jovinus, as they lost key military support against their barbarian rivals and the legitimate imperial government.
In 413 CE, Sebastianus's situation fell apart when Ataulf's forces captured him. Instead of executing him or using him as a bargaining chip, Ataulf turned him over to Dardanus, who was Honorius's praetorian prefect in Gaul. This move showed Ataulf's own complicated ties with the imperial government and his wish to show loyalty to Ravenna. Dardanus quickly executed Sebastianus and sent his severed head to Honorius's court at Ravenna, proving his demise and showing allegiance to the legitimate emperor. This gruesome end marked yet another short-lived usurpation during the crumbling years of the Western Roman Empire.
Before Fame
Sebastianus came from the aristocratic circles of southern Gaul at a time when the Western Roman Empire struggled with barbarian migrations and internal political chaos. He belonged to a well-known Gallic family, so he likely received a traditional Roman education and took part in local governance before rising to imperial status. In the early 5th century, ambitious provincial leaders had chances to challenge central authority as emperors struggled to control distant territories.
Sebastianus's rise was closely linked to his brother Jovinus's successful takeover in 411 CE. The political chaos of the time, combined with the weak government of Honorius and the presence of various barbarian groups in Gaul, made it easier for local leaders to break away from Ravenna and claim imperial titles for themselves.
Key Achievements
- Elevated to the rank of Augustus and co-emperor by his brother Jovinus in 412 CE
- Exercised imperial authority over significant portions of Gaul during his reign
- Had coins minted bearing his image and titles at the major mints of Arles and Trier
- Maintained co-imperial rule alongside Jovinus for approximately one year
- Represented aristocratic Gallic resistance to central imperial authority from Ravenna
Did You Know?
- 01.Coins minted during his reign at Arles and Trier provide some of the only surviving contemporary evidence of his rule and appearance
- 02.His execution by Dardanus and the sending of his head to Ravenna followed ancient Roman practices for dealing with defeated usurpers and rebels
- 03.He ruled for less than two years, making his reign one of the shorter imperial usurpations of the 5th century
- 04.His brother Jovinus met a similar fate, being captured and executed shortly after Sebastianus's death
- 05.The mint at Trier that produced coins in his name had previously served as an imperial capital under earlier emperors