- Casini, Vergilio1
- Castello di Rapolano (Rapolano Terme, Italy)1
- Castrucci, Antonio1
- Catholic Church. Archdiocese of Florence (Italy)1
- Catholic Church. Archdiocese of Guatemala (Guatemala)1
- Catholic Church. Archdiocese of Mexico City (Mexico)1
- Catholic Church. Archdiocese of Oaxaca (Mexico)1
- Catholic Church. Archdiocese of Wrocław (Poland)1
- Caucasus1
- Cavalcanti, Aldobrandino, 1217-12791
- Cecchi, Giovannino1
- Cecco, Antonio1
- Cecco, Nato di1
- Cecco, d'Ascoli, 1269-13271
- Ceccoli, Baldo1
- Ceccoli, Bartolo1
- Celleri, Azzo1
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- Certano, Daina di1