The Council of Ephesus is the third ecumenical council, after those of Nicaea (325) and Constantinople (381), accepted by the Armenian Church. It was held over several sessions in 431 at the Church of Mary in Ephesus, Asia Minor (nowadays western Turkey). The council was called after Patriarch Cyril of Alexandria appealed Pope Celestine I to condemn Patriarch Nestorius of Constantinople for heresy due to …