- Cosimo II, Grand Duke of Tuscany, 1590-16211
- Cosimo III, Grand-Duke of Tuscany, 1642-17231
- Costapellegrina, Giovan Andrea1
- Courts and courtiers1
- Cressida (Fictitious character)1
- Criminals1
- Croatia--Dalmatia1
- Croatia--Šibenik1
- Crucifixion of Jesus Christ1
- Crusades (Fourth) (1202-1204)1
- Cryptography1
- Cueva y de Castilla, Beltrán III de la, Duke of Alburquerque, -16121
- Cueva, Andrea della1
- Cults1
- Dal Borgo family1
- Dates (Provenance)1
- Davanzati, Francesco1
- Deadly sins1
- Debt cancellation1
- Del Carretto family1