- Coptic manuscripts1
- Corpus commentariorum Averrois in Aristotelem (Averroës)1
- Courtly love1
- Courts and courtiers1
- Coutinho, Francisco de Sousa, 1597 or 1598-16601
- Credit1
- Cronica general de España (Ocampo, Florián de)1
- Crucifixion of Jesus Christ1
- Crusades1
- Crusades (Second) (1147-1149)1
- Crypto-Jews1
- Crypto-Jews--Legal status, laws, etc.1
- Cyropaedia (Xenophon)1
- Cyrus, the Great, King of Persia, -530 B.C. or 529 B.C.1
- Dance1
- Darius I, King of Persia, 548 B.C.-485 B.C.1
- De generatione et corruptione (Aristotle)1
- De interpretatione (Aristotle)1
- Debtor and creditor1
- Debts, External1