- Canticles3
- Categoriae (Aristotle)3
- Catherine, of Siena, Saint, 1347-13803
- Catholic Church. Archdiocese of Siena (Italy)3
- Charitable uses, trusts, and foundations (Jewish law)3
- Charities3
- Charity3
- Charlemagne, Emperor, 742-8143
- Charles V, Holy Roman Emperor, 1500-15583
- Christian ethics--Middle Ages3
- Christian life--Catholic authors3
- Christian saints--Biography3
- Christian saints--Cult3
- Christian women saints3
- Christian women--Conduct of life3
- Christianity--Controversial literature3
- Chronology, Historical3
- Church and state3
- Church calendar3
- Clare, of Assisi, Saint, 1194-12533