Bithynia
Bithynia was an ancient place called the region facing the Black Sea in northern Asia Minor, with a kingdom of the same name and a province during the Roman Empire. It is the present northern part of Turkey in Asia. Locally, it was located in a geographically important location from the Sea of Marmara, the Bosphorus and the Black Sea. The important cities were Nicomeda, Calcadon, and Nicaea. According to ancient records such as Herodotus and Xenophon, Vittnia was subordinated to the Lydian and Persian empires, claiming that it was a tribal land from Trace, but it seems that independence was guaranteed. In the third century BCE, Nicomedes I greatly expanded its powers to establish Nicomedia and emerge as a powerful nation in Asia Minor. However, when Nicomedes IV was born in the 1st century BCE, he was threatened by Mithridates VI of Pontus and could not keep his independence. Finally he gave in to Rome and dedicated it to Rome.