- Censures, Ecclesiastical1
- Cesare d'Este, Duke of Modena and Reggio, 1552-16281
- Chants1
- Charles VI, King of France, 1368-14221
- Charles VIII, King of France, 1470-14981
- Charles, Duke of Burgundy, 1433-14771
- Charts, diagrams, etc.1
- Chemistry10
- Chess3
- Chiarini family1
- Childhood of Jesus Christ1
- Children1
- Chivalry1
- Christian converts from Judaism2
- Christian ethics8
- Christian ethics--Middle Ages3
- Christian hagiography5
- Christian heresies4
- Christian heresies--Early church1
- Christian heresies--Middle Ages1