Mount Athos has been inhabited since ancient times and is known for its long Christian presence and historical monastic traditions, which date back to at least 800 AD during the Byzantine era. The mountain along with the respective part of the peninsula have been governed as the monastic community of Mount Athos, an autonomous region within the Hellenic Republic, ecclesiastically under the direct jurisdiction of the Ecumenical Patriarch of Constantinople, while the remainder of the peninsula forms part of the Aristotelis municipality. Mount Athos ( / ˈ æ θ ɒ s/ Greek: Ἄθως, ) is a mountain in the distal part of the eponymous Athos peninsula and site of an important centre of Eastern Orthodox monasticism in northeastern Greece.