Kassa was a town of

ancient Bithynia Bithynia (; ) was an ancient region, kingdom and Roman province in the northwest of Asia Minor (present-day Turkey), adjoining the Sea of Marmara, the Bosporus, and the Black Sea. It bordered Mysia to the southwest, Paphlagonia to the northeast a ...

. Its name does not occur in ancient authors but is inferred from

epigraphic Epigraphy () is the study of inscriptions, or epigraphs, as writing; it is the science of identifying graphemes, clarifying their meanings, classifying their uses according to dates and cultural contexts, and drawing conclusions about the wr ...

and other evidence. Its site is located near

Sapanca Sapanca is a municipality and district of Sakarya Province, Turkey. Its area is 173 km2, and its population is 46,847 (2024). It lies on the south bank of Lake Sapanca. The town's mayor is Nihat Arda Şahin ( CHP). Sapanca has recently beco ...

in Asiatic Turkey.

References

Populated places in Bithynia Former populated places in Turkey History of Sakarya Province {{Sakarya-geo-stub