- Carnesecchi, Amerigo1
- Carretto, Federico del1
- Carretto, Felicita del1
- Carretto, Geronimo del1
- Carretto, Giovanni del1
- Carretto, Paolo del1
- Carthusians1
- Casa, Lodovico della1
- Casini, Ciulla1
- Casini, Vergilio1
- Castello di Rapolano (Rapolano Terme, Italy)1
- Castles1
- Castrucci, Antonio1
- Catalogs1
- Categoriae (Aristotle)1
- Cathedral bindings1
- Catherine, of Alexandria, Saint1
- Catholic Church--History--Sources1
- Catholic Church. Archdeaconry of London (England)1
- Catholic Church. Archdiocese of Cologne (Germany)1