Mark, Bishop of Ephesus
The great teacher and invincible defender of the One, Holy, Catholic, and Apostolic Church, Saint Mark, was the offspring and scion of the imperial city, Constantinople. Reared by most pious parents, and instructed in secular and spiritual wisdom, he became preeminent in both. Saint Mark lived as an ascetic on the Prince's Islands and later in the monastery of Saint George Magana in Constantinople. He passed through all the degrees of the priesthood, and was finally advanced to the dignity of Archbishop and the lofty throne of the Metropolis of Ephesus. At the insistence of Emperor John Paleologos, the Saint was sent to the council of the Latins in Florence, to unite the churches that had been divided for so many years. He astounded the papal teachers with the divine wisdom of his words, and was the only one who did not sign the blasphemous decree of that false council. Because of this, the Holy Church of Christ has ever honored this great man as a benefactor, teacher, sole defender, and invincible champion of the Apostolic Confession. He reposed in 1443.
Apolytikion of Mark, Bp. Of Ephesus in the Third Tone
All-laudable and most divine Mark, * in thee the Church found a great zealot * by thy confession of the holy and sacred Faith; * for thou didst champion the doctrines which the Fathers taught * and didst cast down darkness' boastful pride. * Wherefore pray thou to Christ God for them that honour thee, * that we be granted the forgiveness of sins.
Kontakion of Mark, Bp. Of Ephesus in the Third Tone
Clad, O godly-minded one, with an invincible armor, thou didst dash to pieces the pride of the Western rebellion; thou wast brought forth as the champion of Orthodoxy, as the Comforter's own instrument and pure vessel. For this cause, to thee we cry out: Rejoice, O Mark, thou boast of the Orthodox flock.