Kassa was a town of ancient Bithynia. Its name does not occur in ancient authors but is inferred from epigraphic and other evidence.
Its site is located near Sapanca in Asiatic Turkey.
Coordinates: 40°41′26″N 30°15′49″E / 40.690513°N 30.263486°E / 40.690513; 30.263486
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