Events

• April 7 - The Huns sack Metz
• June 20 - Attila, king of the Huns is defeated at Troyes by Aetius in the Battle of Chalons.
• Thorismund succeeds Theodorid his father as king of the Visigoths.
• October 8 - Council of Chalcedon, Ecumenical council of the Christian church.
• Jerusalem becomes a Patriarchate.
• The Oriental Orthodox churches separate from the rest of the church.
• Dioscorus of Alexandria is deposed as Patriarch of Antioch.
• Sassanid ruler Yazdegerd II of Persia's decree abolishes the Sabbath and orders executions of Jewish leaders, including the Exilarch Mar Nuna.

Births

• Jacob of Serugh - Syriac author
• Brigid of Ireland - Irish saint

Deaths

• Nestorius, founder of Nestorianism (estimated date)
• Theodorid, king of the Visigoths (killed in the Battle of Chalons)