March 29 (old calendar) / April 11 (new) Great Lent Hieromartyr Mark, Bishop of Arethusa, Martyr Cyril the Deacon, of Heliopolis, and others who suffered under Julian the Apostate (ca. 364). Ven. John, Anchorite, of Egypt (4th c.). St. Eustathius the Confessor, Bishop of Bithynia (9th c.). Saint Niketas of the Roslavl Forests (Russia—1793). SAINT MARK BISHOP OF ARETHUSA Hieromartyr Mark, Bishop of Arethusa, suffered for his faith in Christ