- Council of Ephesus1
- Councils and synods, Ecumenical1
- Courtesy books1
- Courts1
- Coutinho, Francisco de Sousa, 1597 or 1598-16601
- Credit1
- Cressida (Fictitious character)1
- Criminals1
- Criticism, Textual1
- Cronica general de España (Ocampo, Florián de)1
- Crucifixion of Jesus Christ1
- Crusades (Second) (1147-1149)1
- Crypto-Jews--Legal status, laws, etc.1
- Cults1
- Cur Deus homo (Anselm, Saint, Archbishop of Canterbury)1
- Cynics (Greek philosophy)1
- Cyropaedia (Xenophon)1
- Cyrus, the Great, King of Persia, -530 B.C. or 529 B.C.1
- Czech Republic1
- Czech Republic--Bohemia1