Oriental Orthodoxy, also known as Old Oriental, Pre-Chalcedonian, Non-Chalcedonian, Miaphysite, and Monophysite Christianity, is the communion of churches in Eastern Christianity that recognizes only the first three ecumenical councils – the First Council of Nicaea in 325, the First Council of Constantinople in 381 and the Council of Ephesus in 431. This communion is composed of six autocephalous churches: the Armenian Apostolic Church, the Coptic Orthodox Church of Alexandria, the Eritrean Orthodox Tewahedo Church, the Ethiopian Orthodox Tewahedo Church, the Malankara Orthodox Syrian Church, and the Syriac Orthodox Church. Oriental Orthodoxy has approximately 84 million adherents worldwide.