Ancient Greek: Γερμανικόπολις
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  Shown within Turkey | |
| Location | Turkey |
|---|---|
| Region | Bursa Province |
| Coordinates | 40°10′N 28°53′E / 40.167°N 28.883°E / 40.167; 28.883 |
Germanicopolis (Greek: Γερμανικόπολις) was an ancient town in Bithynia, also known as Caesarea in Bythinia (not to be confused with Caesarea Germanica, as such a former bishopric and present Latin Catholic titular see.
It was located on the Gelbes river,[1] not far from Prusa (modern Bursa in Turkey). In earlier times it was called Helge, HelgasorBooscoete (Βοὸς κοίτη), Plin. v. 40. Modern scholars locate the town at the village of Tahtalı
The city was taken by the Ottoman Empire in 1326 and the new Ottoman capital city was built at nearby Bursa (the Ancient Prusa).
InByzantine times the town was the see of a suffragan of the Archdiocese of Nicomedia, in the sway of the Patriarchate of Constantinople.
The names of a number of bishops are historically documented:[2]
The diocese was nominally restored in 1933 as Latin Titular bishopric of Cesarea in Bithynia (Latin) / Cesarea di Bitinia (Curiate Italian) / Cæsarien(sis) in Bithynia (Latin adjective).
It is vacant since decades, having had the following incumbents, so far of the fitting Episcopal (lowest) rank :
