Lably
Skip to content

Valentinian I

Roman emperor from 364 to 375

  • 16 min read
  • 7 chapters

Explore on Lably

ToursExplore Lably’s 3D tours

Born into a military family in Pannonia, Valentinian rose through the ranks under emperors Constantius II, Julian and Jovian. Following Jovian's early death, Valentinian was proclaimed emperor, and he subsequently selected his brother Valens as co-emperor. During his reign, he fought successfully against the Alamanni, Quadi, and Sarmatians, strengthening the border fortifications and conducting campaigns across the frontiers. In addition, he dispatched his general Theodosius the Elder to suppress a revolt in Africa and the Great Conspiracy, a coordinated assault on Roman Britain by Picts, Scoti, and Saxons. Valentinian suffered a fatal stroke at a meeting with Quadi envoys in Pannonia, with his sons Gratian and Valentinian II succeeding him in the western half of the empire.

Early life

Valentinian was born in 321 at Cibalae (now Vinkovci, Croatia) in southern Pannonia into a family of Illyro-Roman origin. Valentinian and his younger brother Valens were the sons of Gratianus (nicknamed Funarius), a military officer renowned for his wrestling skills.

Gratianus was promoted to comes Africae in the late 320s or early 330s, and the young Valentinian accompanied his father to Africa. However, Gratianus was soon accused of embezzlement and retired. Valentinian joined the army in the late 330s and later probably acquired the position of protector domesticus. Gratianus was later recalled during the early 340s and was made comes Britanniarum. After holding this post, he retired to the family estate in Cibalae.

In 350, Constans I was assassinated by agents of the usurper Magnentius, a commander who proclaimed himself emperor in Gaul. Constantius II, older brother of Constans and emperor in the East, promptly set forth towards Magnentius with a large army. The following year the two emperors met in Pannonia and fought the Battle of Mursa Major, which ended in a costly victory for Constantius. Two years later Magnentius killed himself after another defeat at the Battle of Mons Seleucus, leaving Constantius sole ruler of the empire. It was around this time that Constantius confiscated Gratianus' property, for supposedly showing hospitality to Magnentius when he was in Pannonia. Despite his father's fall from favour, Valentinian does not seem to have been adversely affected at this time, making it unlikely he ever fought for the usurper. It is known that Valentinian was in the region during the conflict, but what involvement he had in the war, if any, is unknown.

Sign in to keep reading

6 more chapters are free with a Lably account.

More in Politicians and leaders