On Saturday, October 28, the Armenian Church commemorates the Twelve Holy Teachers (Doctors) of the Church, namely: Hierotheus of Athens, Dionysius the Areopagite, Sylvester of Rome, Athanasius of Alexandria, Cyril of Jerusalem, Ephrem the Syrian, Basil of Caesarea, Gregory of Nyssa, Gregory the Theologian, Epiphanius of Cyprus, John Chrysostom, and Cyril of Alexandria.