Colonia Iulia Felix, modern Sinop. Originally a Greek colony, Sinope was conquered by Rome in 70 BC. Julius Caesar founded the colony named after him in 47 BC. Sinope was associated with the 'sinopis'-trade, a red ocher used as a pigment. The Pontic king Mithridates The Great, an important adversary of Rome, was born in Sinope.
Sources:
- Philipp Niewohner, The Archaeology of Byzantine Anatolia: From the End of Late Antiquity until the Coming of the Turks, Oxford University Press 2017
- https://www.academia.edu/18165424/Defensive_Architecture_in_the_Black_Sea_Region_during_the_Age_of_Justinian_I, p. 80