Marcus Eremita was a fifth-century Christian theologian and ascetic writer who lived as a monk. Belonging to the Antiochene School, he is often identified as a disciple of John Chrysostom. Rather than focusing on complex dogmatic disputes, his writings primarily addressed the practical spiritual life of monks. He is believed to have served as a superior of a laura at Ancyra before living as a hermit, possibly in the desert regions near Palestine, until his death in Ancyra around 430.