Besa () was a deme of ancient Athens, situated in the mining district, midway between Anaphlystus and Thoricus,Xenophon, Vect. 4.43-44. and 300 stadia from Athens main city.Isaeus, de Pyrrh. Her. p. 40, Steph. Xenophon recommended the erection of a fortress at Besa, which would thus connect the two fortresses situated respectively at Anaphlystus and Thoricus.
The site of Besa is located near the modern Synterina.
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