Valentinian I
| Valentinian the Great | |||||
|---|---|---|---|---|---|
Solidus of Valentinian marked: d·n· valentinianus p·f· aug· | |||||
| Roman emperor | |||||
| Reign | 26 February 364 – 17 November 375 | ||||
| Predecessor | Jovian | ||||
| Successor | Gratian and Valentinian II | ||||
| Co-emperor | Valens (in the East) | ||||
| Born | 321 Cibalae, Pannonia, Roman Empire (now Vinkovci, Croatia) | ||||
| Died | 17 November 375 (aged 54) Brigetio, Pannonia Valeria (now Szőny, Hungary) | ||||
| Spouse | Marina Severa Justina | ||||
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| Dynasty | Valentinianic | ||||
| Father | Gratianus Funarius | ||||
| Religion | Nicene Christianity | ||||
Valentinian I (Latin: Valentinianus; 321 – 17 November 375), also known as Valentinian the Great, was Roman emperor from 364 to 375. He ruled the Western half of the empire, while his brother Valens ruled the East. During his reign, he fought successfully against the Alamanni, Quadi, and Sarmatians, strengthening the border fortifications and conducting campaigns across the Rhine and Danube. His general Theodosius defeated a revolt in Africa and the Great Conspiracy, a coordinated assault on Roman Britain by Picts, Scoti, and Saxons. Valentinian founded the Valentinian dynasty, with his sons Gratian and Valentinian II succeeding him in the western half of the empire.