- Crusades (Fifth) (1218-1221)1
- Crusades (Fourth) (1202-1204)1
- Cuenca, Alonso Gaytan de1
- Cuenca, Francisco Gaytan de1
- Cuenca, Juan Gaytan de1
- Cueva y de Castilla, Beltrán III de la, Duke of Alburquerque, -16121
- Cueva, Andrea della1
- Customary law1
- Cynics (Greek philosophy)1
- Cyprus1
- Cyprus--Paphos (District)1
- Czech Republic1
- Dal Borgo family1
- Dance of death1
- Dati, Agostino, 1420-14781
- Dati, Jacopo1
- Dati, Niccolò, 1458-1500 or 15011
- Davanzati, Francesco1
- Davanzati, Niccolò1
- De institutione musica (Boethius)1