- Carthusians1
- Castilla y León (Spain). Cortes1
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- Catherine, of Alexandria, Saint1
- Catholic Church. Archdiocese of Lyon (France)1
- Catholic Church. Diocese of Sigüenza-Guadalajara (Spain)1
- Cavalcanti, Aldobrandino, 1217-12791
- Cavallero, Diego1
- Cecco, d'Ascoli, 1269-13271
- Celibacy--Christianity1
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- Charles II, King of Spain, 1661-17001
- Charles VI, King of France, 1368-14221
- Charles, Duke of Burgundy, 1433-14771
- Charon (Greek mythology)1
- Chess1
- Chiesa di San Domenico (Ferrara, Italy)1