Basilinopolis or Basilinoupolis (Greek: Βασιλινούπολις) was a town in Bithynia Prima (civil Diocese of Pontus), which obtained the rank of a city under, or perhaps shortly before, Roman Emperor Julian the Apostate, whose mother was Basilina.[1]
Its exact site is not known. W. M. Ramsay, placed it on the western side of the Lake of Nicaea, near Pazarköy, between Kios (now Gemlik) and Nicaea (Iznik).[2] Modern scholars tentatively identify its site near Yalakdere in Kocaeli Province.[3][4]