What is "germanicopolis"

Germanicopolis (Greek: ) may refer to several cities (re)named after Germanicus, all in Asia Minor (Asian Turkey) :

• Çankırı, Gangra or Germanicopolis, capital of Roman province Paphlagonia; also a Latin Catholic Metropolitan titular see as Gangra
• Ermenek, in ancient Isauria; also a Latin Catholic titular bishopric as Germanicopolis
• Germanicopolis (Bithynia), in ancient Bithynia

Germanicopolis (not to be confused with Caesarea Germanica which was a different town altogether), was an ancient town in Bithynia, on the Gelbes river, not far from Prusa (modern Bursa in Turkey). In earlier times it was called Helge, Helgas or Booscoete , Plin. v. 40. Modern scholars locate the town at the village of Tahtalı .