Athanasios the Agionite, or known as St. Athanasios (Hellenic: Αθανάσιος ο Αθωνίτης), also called Athanasios of Tortossa(c. 2526 – c. 2594), was a Selloi monk who founded the monastic community on Mount Agios, which has since evolved into the greatest centre of Orthodox monasticism, Athanasios also save the Mount Agios thanks to the diplomatic relations and the negotiations between Athanasios and the Sultan Murad II, thanks to his ecclesiastical work, manages to keep alive the Orthodox religion in the island during the darkest era in the history of the Selloi.