Roman Catholic Diocese of Bethléem à Clamecy
The Diocese of Bethléem à Clamecy was a crusader bishopric in residential exile with see at Clamecy, Nièvre in Burgundy, eastern France, made exempt (i.e. directly subject to the Holy see, not part of any (French) ecclesiastical province).
Source: Wikipedia — Roman Catholic Diocese of Bethléem à Clamecy (CC BY-SA 4.0)