- Casuistry1
- Categories (Philosophy)1
- Catherine, of Alexandria, Saint1
- Catholic Church. Collectarium1
- Catholic church buildings1
- Catiline, approximately 108 B.C.-62 B.C.1
- Censures, Ecclesiastical1
- Certosa del Galluzzo (Florence, Italy)1
- Chants1
- Charts, diagrams, etc.1
- Chess1
- Christian life--Catholic authors1
- Christian literature, Early1
- Christian pilgrims and pilgrimages1
- Christian poetry, English (Middle)1
- Christian poetry, French1
- Christian poetry, Latin (Medieval and modern)1
- Christian shrines1
- Christian women1
- Christology1