358 CE
An earthquake destroys Nicomedia, and damages 150 cities in Macedonia, Asia and Pontus. The last universally binding decision, of the Great Sanhedrin, establishes a fixed Hebrew calendar. An invasion of Pannonia by the Quadi and the Sarmates is repulsed by Constantius II.
Geopolitics & Diplomacy
- The Salian Franks capitulate to Julian the Apostate in Gaul. He allows them to form a Roman foederati in Toxandria. Frankish settlers are established in areas in the north and the east to help with the defense of the Rhine frontier.source
- Emperor Constantius II builds new forts to secure upper Mesopotamia. Persia's king Shapur II sends an emissary to Constantinople with gifts and a letter wrapped in white silk. He requests that Constantius return the lands of his ancestors from the Euphrates to the frontier of Macedonia. Constantius tactfully refuses to cede any territories.source
Conflict & Security
- An invasion of Pannonia by the Quadi and the Sarmates is repulsed by Constantius II.source
Religion & Belief
- Constantius II recalls Pope Liberius to Rome, where he receives a joyous welcome from the Christians. Antipope Felix II prudently retires to his estate near Porto (Portugal).source
- The last universally binding decision, of the Great Sanhedrin, establishes a fixed Hebrew calendar.source
- Eudoxius becomes Patriarch of Antioch.source
Climate & Environment
- August 24 — An earthquake destroys Nicomedia, and damages 150 cities in Macedonia, Asia and Pontus.source
Births
- Aignan of Orleans, Christian bishop (d. 453)source