Marcus Eremita, Mark the Ascetic or Marcus the Ascetic was a Christian theologian, saint, and ascetic writer of the fifth century AD.
Mark is rather an ascetic than a dogmatic writer. He is content to accept dogmas from the Church; his interest is in the spiritual life as it should be led by monks. He is practical rather than mystic, belongs to the Antiochene School and shows himself to be a disciple of John Chrysostom.
Various theories about his period and works have been advanced. According to Johannes Kunze, Mark the Hermit was superior of a laura at Ancyra; he then as an old man left his monastery and became a hermit, probably in the desert east of Palestine, near St. Sabas. He was a contemporary of Nestorius and died probably before the Council of Chalcedon .