The Touristic Info Halkidiki informs: Mount Athos - Monasteries and skites
On the Holy Mount Athos, there are several monasteries, whose total number by the Typikon of 1783 and since 1924 is also by law set to 20. There are a further 12 Skites and various Kellie and hermitages.
The monasteries themselves have almost all the same basic architecture. Thus, the outer complexes are usually built like a fortress, often with towers, battlements and parapets. Thus they could defend themselfs in the past often - but unfortunately not always - successfully against pirate attacks. The structure of the monasteries is usually applied rectangular. The outer walls, the inner catholic courtyards, the monastery church, which always have a cross with a dome. In between each are the common rooms and monks' cells.
Those who have the intention to visit a monastery or even to stay there are well advised to first register by telephone. Because sometimes visitors don't fit the monks at certain times not at all, or the beds are already full.
Below are the monasteries, not alphabetically, but according to the typical list of the monastic republic hierarchical ranking of 1 to 20. This has existed since the 16th Century to today unchanged and was confirmed by the Typikon of 1783.
Some monks do not live in the monasteries, but in Skites. Skites are village-like monk settlements. In every house of those settlements live from 3 to 6 monks und/or novices. Every Skiti has it's own church or chapel and is lead by a prior, who is responsible at the mother-monastery.
Even smaller then Skites are these single accomodations, in which live also at most 6 monks together. Although they are also subordinate to a monastery, they mostly can determine their own way of life.
Once many hermits or wandering monks, who lived a live of absolute asceticism in secluded huts or even caves, were on Athos. Such journeymen are today rather rare, but they existed in a not so small number.