- Categoriae (Aristotle)1
- Catherine, of Siena, Saint, 1347-13801
- Catholic Church. Archdiocese of Wrocław (Poland)1
- Catholic Church. Curia Romana1
- Catholic Church. Diocese of Toul (France)1
- Catholic authors1
- Cathédrale Saint-Etienne (Toul, France)1
- 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
- Chess1
- Chiarini family1
- Childhood of Jesus Christ1
- Children1
- Christian converts from Judaism1
- Christian heresies--Early church1
- Christian heresies--Middle Ages1
- Christian heretics1