The Fathers of the late 5th century to the 15th century. Christological Disputes. St. Cyril of Alexandria; St. Leo of Rome; St. Maximus the Confessor; St. John of Damascus; St. Symeon the New Theologian; St. Gregory Palamas; St. Mark Eugenicus,  Dionysius the Areopagite (Pseudo-Dionysius),  St. Photius;  St. Nicholas Cabasilas