Burkhard von Weisbriach was an ecclesiastical principality whose capital was the former city of what?
Archbishopric of Salzburg The Prince-Archbishopric of Salzburg (German: "Fürsterzbistum Salzburg" ) was an ecclesiastical principality and state of the Holy Roman Empire. It comprised the secular territory ruled by the Archbishops of Salzburg, as distinguished from the much larger Catholic diocese founded in 739 by Saint Boniface in the German stem duchy of Bavaria. The capital of the archbishopric was Salzburg, the former Roman city of "Iuvavum ".
Bishopric of Lebus The Bishopric of Lebus (German: "Bistum Lebus" ; Polish: "Diecezja lubuska" ) was a Roman Catholic diocese of Poland and later an ecclesiastical territory of the Holy Roman Empire. It existed from 1125 until 1598. The diocese encompassed areas on both sides of the Oder River around the town of Lebus later called Lubusz Land.