Prusias ad Hypium - Credit: Wikimedia Commons
Prusias ad Hypium - Credit: Wikimedia Commons
Prusias ad Hypium () was a city in ancient Bithynia, and afterwards in the late Roman province of Honorias. In the 4th century it became a bishopric that was a suffragan of Claudiopolis in Honoriade. Before its conquest by King Prusias I of Bithynia, it was named Cierus or Kieros () and belonged to the Heraclea Pontica.Harry Thurston Peck, Harpers Dictionary of Classical Antiquities (1898), Prusa Photius writes that it was called Kieros, after the river which flows by it.Photius, Bibliotheca excerpts, § 224.32.1 Read more on Wikipedia
Source: en.wikipedia.org