 The prince-bishops had seat and vote on the Ecclesiastical Bench of the College of Ruling Princes of the Imperial Diet.The Prince-Bishopric of Lübeck, a secular state, should not be confused with the Diocese of Lübeck, which was larger and over which the bishop exercised only pastoral authority.The original diocese was founded about 970 by Emperor Otto I in the Billung March at Oldenburg in Holstein ("Aldinborg" or "Starigard"), the former capital of the pagan Wagri tribe.