Events By place Europe Vortigern forms an alliance with Hengest and Horsa, by tradition chieftains of the Jutes, who led the Anglo-Saxon invasion of Britain (traditional date). By topic Religion August 3—The Second Council of Ephesus opens, chaired by Dioscorus, Patriarch of Alexandria. Flavian, Patriarch of Constantinople, and Domnus II, Patriarch of Antioch, are deposed on August 8. October – A Roman synod repudiates all the decisions of the Second Council of Ephesus. Anatolius b… (More on 449)