Example image of eyePlorer eyePlorer map for 'Investiture Controversy': Church and state in medieval Europe Abbot Bishop Investiture Pope France in the Middle Ages Henry I of England Henry IV, Holy Roman Emperor Pope Gregory VII Pope Paschal II Concordat of Worms Catholic Church Decline of the Roman Empire Simony Literacy Holy Roman Emperor Gregorian Reform College of Cardinals In Nomine Domini Auctoritas Dictatus papae Episcopal see Lateran Palace Pope Gelasius I Balance of power in international relations Early Middle Ages Roman Catholic Archdiocese of Milan Excommunication First Battle of Langensalza Fiefdom Canossa Cilice Walk to Canossa Great Saxon Revolt Rudolf of Rheinfelden Antipope Clement III Norman conquest of southern Italy Sack of Rome (1084) Henry V, Holy Roman Emperor Antipope Gregory VIII Donation of Constantine Pope Alexander II William I of England Anselm of Canterbury Commendation ceremony Temporalities Norman conquest of England Vassal Abbey Diocese