After the Council of Chalcedon in AD 451, the see of Alexandria was troubled by the conflict between the Chalcedonians and the anti-Chalcedonians. The Council deposed Bishop Dioscorus I of Alexandria who fiercly supported Eutyches, an ardent promoter of the formula of "one nature" of Christ. After his death in 454 the Alexandrine anti-Chalcedonians elected as the bishop Timothy II Aelurus, while the Chalcedonians chose Proterius. Emperor Leo expelled Timothy in 460 and replaced him with a Chalcedonian, Timothy III Salophakiolos. Timothy II came back to Alexandria in 475 and ruled there until his death in 477. The successor of Timothy II was Peter Mongos who was, nevertheless, expelled by the Emperor Zeno, and Timothy III was installed again. Timothy III regained his position which he retained till his death in 481. He was succeded by John Talaia, but as John refused to sign the Henoticon in 482 of the Emperor Zeno, the Emperor reinstalled Peter Mongos to the Alexandrian See. Peter signed the Henoticon and entered the communion with Acacius of Constantinople. John Talaia appealed to Pope Felix III who defended his rights before Acacius. Acacius, however, did not agree with the Pope and thus, was excommunicated by him along with Peter Mongos in 484. It was the beginning of the so-called Acacian Schism that lasted to the year 519 (see Kosinski 2002: 177-202).