Angelius appears to have been the immediate successor of Acesius (q.v.) as Novatian bishop at Constantinople, A.D. 345, and to have held his see till his death, in 384. Suffering by the fierce persecution ot the Homoousians, he fled from Constantinople (Socrates, Hist. Eccles. 2, 38). As a Homoousian he was persecuted and banished by Valens. He was consulted by Nectarius when Theodosius opened his plan for restoring peace to the divided Church in 383. Doubting his ability in disputation, Angelius deputed his lector, Sisinnius, to represent him. He also named him as his successor, but the people preferring Marciani, he yielded to them on the condition that if Sisinnius outlived Marcian he should be the next bishop.