- Cortigiani, Giovanni1
- Cosimo II, Grand Duke of Tuscany, 1590-16211
- Cosimo III, Grand-Duke of Tuscany, 1642-17231
- Cosmography1
- Costapellegrina, Giovan Andrea1
- Cottricciaio, Mariotto1
- Council of Pisa--(2nd : 1511-1512)1
- Covoni, Luigi de1
- Creeds1
- Cresci, Mariotto1
- Crespo, Johannes1
- Cristofano, Filippo di1
- Cristoforo, Pietro di1
- Criticism, Textual1
- Croatia--Šibenik1
- Crucifixion of Jesus Christ1
- Crusades (Fifth) (1218-1221)1
- Cryptography1
- Cueva y de Castilla, Beltrán III de la, Duke of Alburquerque, -16121
- Cueva, Andrea della1