Bithynia
…sat on the fertile shores of the Propontis (which is now known as the Sea of Marmara): Nicomedia, Chalcedon, Cius and Apamea. Bithynia also contained Nicaea, noted for being the birthplace of the Nicene Creed. According to Strabo, Bithynia was bounded on the east by the river Sangarius (modern Sakarya), but…