431

Events

 * June - Council of Ephesus: Nestorianism is rejected, the Nicene creed is declared to be complete. Nestorius is deposed from his see.
 * October 1 - Maximianus is enthroned as Patriarch of Constantinople.
 * Pope Celestine I dispatches Palladius to serve as bishop to the Irish

Deaths

 * June 22, Saint Paulinus of Nola, early Christian bishop, poet