Cyril of Alexandria

Cyril of Alexandria (c. 376–444) was the Patriarch of Alexandria from 412 until his death and one of the most formidable theologians of the early Church. His defense of the title 'Theotokos' (God-Bearer) for the Virgin Mary against the teachings of Nestorius, Patriarch of Constantinople, shaped Christological orthodoxy for all subsequent Christian generations. Cyril assumed the patriarchate when Alexandria was at the height of its influence in the Roman Empire. The city's theological school, rooted in allegorical biblical interpretation, had long stood in tension with the more literal Antiochene tradition, and the conflict between Cyril and Nestorius was in part a collision between these two intellectual worlds. The dispute turned on whether Mary could rightly be called 'Theotokos.' Nestorius, reflecting Antiochene caution, preferred 'Christotokos' (Christ-Bearer), arguing that Mary bore Christ's human nature, not his divine nature. Cyril saw in this a fatal fracturing of Christ's person: if the human and divine were so sharply divided, the very mechanism of salvation collapsed. His formula — that in Christ there is 'one nature of the incarnate Word' — insisted on the inseparable union of divinity and humanity in a single subject. The Council of Ephesus in 431, which Cyril convened and over which he presided, condemned Nestorius and affirmed Mary as Theotokos. Cyril also excluded Nestorius's ally, Patriarch John of Antioch, from the proceedings for arriving late — a move that deepened the factional bitterness surrounding the council. The Nestorian bishops, holding their own rival session, declared Cyril himself a heretic and 'a monster born for the destruction of the Church.' Cyril's patriarchate was not without serious controversy. Early in his tenure he expelled Alexandria's Novatian community and then drove the Jewish population from the city, actions that brought him into open conflict with the Roman prefect Orestes. He is also linked, with disputed degrees of responsibility, to the murder of the Neoplatonist philosopher Hypatia by a Christian mob in 415. Historians continue to disagree over how directly his rhetoric inflamed that violence. His extensive writings — commentaries on the Gospel of John and on Luke, numerous anti-Nestorian treatises, and a Paschal table dedicated to Emperor Theodosius II — earned him the titles 'Pillar of Faith' and 'Seal of All the Fathers.' He is venerated as a Doctor of the Church. The Catholic Church added his feast to the calendar in 1882 (initially on 9 February); the 1969 revision moved it to 27 June, the date observed by the Coptic Orthodox Church and the Lutheran calendar. Eastern Orthodox and Byzantine Catholic Christians commemorate him on 9 June and again on 18 January alongside Pope Athanasius I of Alexandria.