Saint Peter was Bishop of Alexandria for twelve years. It was he who excommunicated Arius. When some of Arius' followers appealed to the Bishop to restore Arius to the communion of the Church, they were surprised by the bishop's vehement refusal, for the heretic had not yet clearly and publicly made known his blasphemous teaching that the Son is a creation of the Father. The holy bishop then revealed to these followers a vision he had seen, in which Christ appeared to him as a child wearing a garment torn in half from head to foot. When St Peter asked the Lord who had rent His garment, he said that it was Arius, who must not be received back into communion.   The holy bishop was beheaded during the reign of Maximinus. He is called the "Seal of the Martyrs" because he was the last Bishop of Alexandria to suffer martyrdom under the pagan Emperors.