Pythagoras Cave, Samos, Greece - photo from protothemanews; "The cave system on Mt. Kerdis, on the island was once home to the famous mathematician and philosopher, Pythagoras. He fled here when he was pursued by the tyrant Polycrates at around 400 B.C." Actually there are 2 caves – "Pythagoras’s ‘living cave’ and a classroom for his teaching. The chapel of St. John was later built at one of the caves."