- Callistus II, Pope, -11241
- Canon law1
- Cardinals1
- Cardona, Catalina de, 1519-15771
- Carlos, Prince of Viana, 1421-14612
- Caro, Ana1
- Caroline minuscule1
- Carrillo family1
- Carrillo, Pedro, -approximately 1436--Family1
- Carthusians1
- Cartularies1
- Castile (Kingdom). Cortes1
- Castilla y León (Spain). Cortes2
- Catches3
- Categoriae (Aristotle)2
- Cathedrals1
- Catholic Church52
- Catholic Church. Diocese of Sigüenza-Guadalajara (Spain)1
- Catholic Church. Province of Santiago de Compostela (Spain)1
- Catiline, approximately 108 B.C.-62 B.C.1