- Byzantine chants1
- Bēssariōn, Cardinal, 1403-14721
- Cacciaguerra, Renaldus1
- California--Berkeley4
- Camaldolese1
- Canon law4
- Caracciolo, Antonio, 1515?-15701
- Cardinals1
- Cardinals--Biography1
- Caroline minuscule2
- Castello di Rapolano (Rapolano Terme, Italy)1
- Catholic Church8
- Catholic Church. Archdiocese of Siena (Italy)5
- Catholic Church. Cancellaria Apostolica4
- Catholic Church. Diocese of Sion (Switzerland)1
- Cavalcanti, Aldobrandino, 1217-12791
- Charlemagne, Emperor, 742-8141
- Charles V, Holy Roman Emperor, 1500-15581
- Charters1
- Chiarini family1