The Diocese of Passau is a Latin diocese of the Catholic Church in Germany that is a suffragan of the Archdiocese of Munich and Freising. The Prince-Bishopric of Passau was an ecclesiastical principality that existed for centuries until it was secularized in 1803. The diocese covers an area of 5,442 km².

The Archdiocese of Munich and Freising is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Bavaria, Germany. It is governed by the Archbishop of Munich and Freising, who administers the see from the co-cathedral in Munich, the Frauenkirche. The other, much older co-cathedral is Freising Cathedral.