- Leo IX (1049-1054)
- Cardinals
- Simony
- Celibacy
- Gregory VII (1073-1085)
- Hildebrand
- Freedom of the Church
- Henry IV (1056-1106)
- Investiture Controversy (1073-1085)
- Bishopric of Milan
- Excommunication
- Canossa
- Concordat of Worms (1122)
- Innocent III
- 4th Latern Council (1215)
- Albigensian Crusade
- Philip II Augustus
- King John
- Thronstreit (1197-1215)