Our Holy Father Mark Eugenikos, Metropolitan of Ephesus and Confessor of the Orthodox Faith (1443)

This holy defender of the One, Holy, Catholic and Apostolic Church labored in the final days of the Byzantine Empire, when, pressed on all sides by the Turks, the Emperor in desperation sought union with (or rather submission to) the Papacy in hopes of obtaining aid from the West. It was St Mark who stood almost alone to prevent such a disaster to the Faith.