Monastero di Patmos (Grecia)
Egeo Meridionale Guarda la lista di castelli in Grecia
The first thing you notice on Patmos is the monastery of St John the Divine or the Evangelist. It crowns the hill of Hora. It looks like a Byzantine castle and was built like a fortress. Its presence is overwhelming. It was founded in 1088 by Ossios Christodoulos following a grant by the Byzantine Emperor Alexios I. Komnenos.
The monastery’s walls are over 15 meters high, its length from north to south is 53 meters and from east to west 70 meters. It seems even larger when you stand at the entrance, noticing its thick walls and heavily reinforced door.
Above the entrance several meters high there is a small opening from which burning hot oil, water, even lead was poured over to attack pirates and other invaders trying to break the gate, this opening was called "the killer", and was considered the last resort for keeping the Monastery safe.