- Coptic Christian saints1
- Coptic Church1
- Cords1
- Corpus commentariorum Averrois in Aristotelem (Averroës)1
- Correspondence (Cyprian, Saint, Bishop of Carthage)1
- Cosmology, Ancient1
- Cost1
- Costa, Gaspar, active 1533-15341
- 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