- Crypto-Jews2
- Crypto-Jews--Legal status, laws, etc.1
- Cryptography1
- Cuckoos1
- Cueva y de Castilla, Beltrán III de la, Duke of Alburquerque, -16121
- Cults1
- Cur Deus homo (Anselm, Saint, Archbishop of Canterbury)1
- Curiosities and wonders1
- Customary law1
- Cynics (Greek philosophy)1
- Cyprus1
- Cyropaedia (Xenophon)1
- Cyrus, the Great, King of Persia, -530 B.C. or 529 B.C.1
- Czech Republic2
- Czech Republic--Bohemia2
- Czech Republic--Lipník nad Bečvou1
- Czech Republic--Prague1
- Czech Republic--Roudnice nad Labem1
- Czech Republic--Uherský Brod1
- Czech Republic--Úsov1