Prince-Bishopric of Montenegro
The Prince-Bishopric of Montenegro (Serbian: Митрополство Црногорско / Mitropolstvo Crnogorsko, lit. 'Metropolitanate of the Black Mountain') was a Serbian Orthodox ecclesiastical principality that existed from 1516 until 1852. The principality was located around modern-day Montenegro.
Source: Wikipedia — Prince-Bishopric of Montenegro (CC BY-SA 4.0)