Christian Cyclopedia

(ca. 376–444). Succeeded his uncle Theophilus* as abp. of Alexandria 412; under him that see reached its height of power; opposed Nestorius,* whose deposition he brought about; also opposed Arians, Novatians, Jews, and Neoplatonists; final formulation of the doctrine of the Trinity was his work. Works include De adoratione in spiritu et veritate; Glaphyra; Thesaurus de sancta et consubstantiali Trinitate; commentaries. See also Ephesus, Third Ecumenical Council of; Mariology; Mark, Liturgy of Saint; Nestorianism.