381. Death at Constantinople of Athanaricus, leader of the Goths. The three books, De Spiritu Sancto, written. Death of Peter, Bishop of Alexandria. The Œcumenical Council of Constantinople commences under the presidency of Meletius of Antioch. Also at Aquileia a council, at which St. Ambrose took a leading part, was held against the heretics Palladius and Secundianus. An account is given of the proceedings in Epistles 9–12.