- Catholic Church. Archdiocese of Wrocław (Poland)1
- Catholic Church. Cancellaria Apostolica4
- Catholic Church. Curia Romana1
- Catholic Church. Diocese of Cortona (Italy)1
- Catholic Church. Diocese of Pistoia (Italy)3
- Catholic Church. Diocese of Sion (Switzerland)1
- Catholic Church. Diocese of Toul (France)1
- Cathédrale Saint-Etienne (Toul, France)1
- Catiline, approximately 108 B.C.-62 B.C.2
- Causation2
- Cavalcanti, Aldobrandino, 1217-12791
- Caṇḍi (Hindu deity)14
- Cecchi, Giovannino1
- Cecco, Antonio1
- Cecco, Nato di1
- Cecco, d'Ascoli, 1269-13271
- Ceccoli, Baldo1
- Ceccoli, Bartolo1
- Celleri, Azzo1
- Celleri, Fabrizio1