Bp. of Alexandria from 312. He was concerned in putting down the Melitian and Arian schisms. He excommunicated Arius, one of his presbyters, c.321, and took a leading part in the Council of Nicaea. Feast day, in the W., 26 Feb.; in the Greek Church, 29 May; in the Coptic Church, 22 Apr.
Subjects: Christianity — Medieval and Renaissance History (500 to 1500).