Bp. of Alexandria from 300. He survived the persecution of Diocletian and drew up rules for the readmission to the Church of those who had lapsed. While he was in hiding, Melitius began to ordain priests and subsequently claimed authority over Alexandria. It seems that Peter returned when peace was restored in 311 but was beheaded soon afterwards. Feast day in the E., 24 Nov.; in the W., 26 Nov.