Mount Athos (Greek: Όρος Άθως) a mountain in Macedonia, northern Greece, also called in Greek Άγιον Όρος (Ayion Oros or Agion Oros) "Holy Mountain." Its area is 130 square miles (336 square km). Mount Athos is home to 20 Eastern Orthodox monasteries and forms a semi-autonomous, self-governing monastic state within Greece. Spiritually, Mount Athos comes under the direct jurisdiction of the Ecumenical Patriarchate of Constantinople.
Though land-linked, the habitable peninsula of Mount Athos is accessible only by boat. The number of visitors is restricted and all are required to get a special entrance permit before entering. Only males are allowed entrance, and Orthodox Christians take precedence in the permit issuance procedure. The current population is around 2,250. Only males over the age of 18 who are members of the Eastern Orthodox Church are allowed to live on Athos.
The monasteries of Mount Athos possess some of the world's most significant examples of Byzantine art, Orthodox icons, and both religious and literary treasures.