- Carretto, Geronimo del1
- Carretto, Giovanni del1
- Carretto, Paolo del1
- Cartularies1
- Casa, Lodovico della1
- Casini, Ciulla1
- Castello di Rapolano (Rapolano Terme, Italy)1
- Castrucci, Antonio1
- Categoriae (Aristotle)1
- Catholic Church. Archdiocese of Florence (Italy)1
- Catholic Church. Archdiocese of Wrocław (Poland)1
- Catholic Church. Curia Romana1
- Catholic Church. Diocese of Cortona (Italy)1
- Catholic Church. Diocese of Sion (Switzerland)1
- Catholic Church. Diocese of Toul (France)1
- Catholic authors1
- Cathédrale Saint-Etienne (Toul, France)1
- Cavalcanti, Aldobrandino, 1217-12791
- Cecchi, Giovannino1
- Cecco, Antonio1