Diocesan feud
- Bremen Diocesan Feud
- Clerical celibacy in the Catholic Church
- Cologne Diocesan Feud
- Concordat of Worms
- Hildesheim Diocesan Feud
- Holy Roman Emperor
- Holy Roman Empire
- Holy See
- Imperial Church System
- Imperial Knight
- Investiture Controversy
- Kingdom of Poland
- Legitimacy (family law)
- Mainz Diocesan Feud
- Münster Diocesan Feud
- Prince-Bishopric of Warmia
- State of the Teutonic Order
- Strasbourg Bishops' War
- Utrecht Schism
- Utrecht war (1456–1458)
- Utrecht war of 1481–83
- War of the Priests (Poland)