The boarder of this monastic state, where it meets the rest of Greece, is marked by an imaginary line drawn from Francocastro on the western coast across to Cape Arapis on the opposite coast, passing close it the foothills of the mountain “Megali Vigla” (Megas Zigos). Until the 3rd Century BC, many small Greek towns existed on the peninsula of Athos, principally colonies originating from Chalkida and Eretria.
The most important of which were Sani, Ouranoupolis, Thisson, Kleones, Dion, Akrathos and Olofixos. Later, these towns declined or were destroyed.
Today on Mount Athos there are 20 monasteries, 17 of them are Greek: Megistis Lavras, Vatopediou ( Greek Cyprian ), Iviron, Koutloumousiou, Agiou Pavlou, Dionissiou, Xenofontos , Stavronikita, Gregoriou, Konstamonitou, Esfigmenou, Doheariou, Karakalou, Xiropotamou, Pantokratoros, Simonos Petras, Filotheou. One monastery is Russian (Agiou Panteleiminos), one is Serbian (Hilandariou) and one is Bulgarian (Zografou).
There are also 14 skites and many kellia, kalives and kathismata.