- Criticism, Textual1
- Criticism, interpretation, etc.1
- Croatia--Šibenik1
- Crucifixion of Jesus Christ1
- Crusades (Fifth) (1218-1221)1
- Cryptography1
- Cur Deus homo (Anselm, Saint, Archbishop of Canterbury)1
- Customary law1
- Czech Republic--Bohemia1
- Czech Republic--Brno1
- Dal Borgo family1
- Dante Alighieri, 1265-13211
- Darius I, King of Persia, 548 B.C.-485 B.C.1
- Dati, Agostino, 1420-14781
- Dati, Jacopo1
- Dati, Niccolò, 1458-1500 or 15011
- Davanzati, Niccolò1
- De bello Gallico (Caesar, Julius)1
- De consolatione philosophiae (Boethius)1
- De ente et essentia (Thomas, Aquinas, Saint)1