Mount Athos (Greek: ÃÅÃÂÿÃâ Ãâ øÃâ°Ãâ, Ãâros ÃÂthos) is a mountain and peninsula in Greece. A World Heritage Site and autonomous polity in the Hellenic Republic, Athos is home to 20 stavropegial Eastern Orthodox monasteries under the direct jurisdiction of the patriarch of Constantinople.