Pytheion (Ancient Greek: Πύθειον), also called Pythia Therma, was a town of ancient Bithynia.

Pythia was embellished with public baths and buildings since the time of Justinian I, and was a famous resort town that people from Constantinople visited for its warm baths and their therapeutic properties.[1] Its site is located near Yalova Kap[clarification needed] in Anatolia.[2][3]

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40°36′14″N 29°13′26″E / 40.60388°N 29.223869°E / 40.60388; 29.223869