Proterius of Alexandria
Pope Proterius of Alexandria was List of Greek [Orthodox Patriarchs of Alexandria|Patriarch of Alexandria] from 451 to 457. He had been appointed by the Council of Chalcedon to replace the deposed Pope [Dioscorus I of Alexandria|Dioscorus]. He regarded as hieromartyr by the Eastern [Orthodox Church] and the Catholic Church.
History
Proterius was elected by the Council of Chalcedon in 451 to replace Dioscorus of Alexandria, who had been deposed as Patriarch by the same council. Upon his arrival in Alexandria, he was met by a riot.His accession marks the beginning of the Schism of 451 between the Coptic Orthodox and the Greek Orthodox Patriarchs of Alexandria|Greek Orthodox] patriarchs of Alexandria, which has never been completely resolved. Because the church of Alexandria was largely anti-Chalcedonian, the deposition of Dioscorus, an anti-Chalcedonian, from the Patriarchate, and the elevation of Proterius, a Chalcedonian, to it, was violently opposed. Finally in 457 the anti-Chalcedonian party in Alexandria elected Pope [Timothy II of Alexandria|Timothy Aelurus] as Patriarch of Alexandria, in opposition to Proterius, who was either subsequently martyred by a Coptic mob or murdered by the Byzantine garrison in Alexandria.
The murder was commented in several letters by groups of bishops from various Roman provinces or larger regions to Byzantine emperor Leo I the Thracian.