- Corbinelli, Girolamo1
- Corbinelli, Pandolfo1
- Correspondence (Cyprian, Saint, Bishop of Carthage)1
- Cortigiani, Giovanni1
- Cosimo II, Grand Duke of Tuscany, 1590-16211
- Cosimo III, Grand-Duke of Tuscany, 1642-17231
- Cottricciaio, Mariotto1
- Country life1
- Courts and courtiers1
- Covoni, Luigi de1
- Cresci, Mariotto1
- Crespo, Johannes1
- Cristofano, Filippo di1
- Cristoforo, Pietro di1
- Croatia--Šibenik1
- Crusades (Fifth) (1218-1221)1
- Cynics (Greek philosophy)1
- Dal Borgo family1
- Darius I, King of Persia, 548 B.C.-485 B.C.1
- Dates (Provenance)1