Bishopric of Naumburg-Zeitz  The Prince-Bishopric of Naumburg-Zeitz (; , then ' or ') was a medieval diocese in the central German area between Leipzig in the east and Erfurt in the west. The seat of the bishop was Zeitz Cathedral in Zeitz from 968 and 1029 and Naumburg Cathedral in Naumburg between 1029 and 1615. It was dissolved in the wake of the Reformation. The Bishopric of Zeitz-Naumburg encompassed the four archdeaconries of Naumburg, Zeitz, Altenburg and "trans Muldam" (comprising the sub-districts ("Unterbezirke") of Lichtenstein, Glauchau, Hartenstein and Lößnitz). The diocese of Zeitz was founded on January 2,  968. Along with Meißen and Merseburg, it had been authorized by Pope John XIII at the Synod of Ravenna the year before, in accordance with a recommendation by Emperor Otto I. All three bishoprics were suffragans of the Archbishopric of Magdeburg.