- Calligraphy, German1
- Callistus II, Pope, -11241
- Carlos, Prince of Viana, 1421-14611
- Carthusians1
- Castile (Kingdom). Cortes1
- Castilla y León (Spain). Cortes1
- Catherine, of Alexandria, Saint1
- Catholic Church. Province of Santiago de Compostela (Spain)1
- Censored works1
- Charters and articles of incorporation1
- Charts, diagrams, etc.1
- Christian life1
- Christian literature, Latin (Medieval and modern)1
- Christian saints1
- Christine, de Pisan, approximately 1364-approximately 1431. Enseignemens moraux1
- Chronicles1
- Church history1
- Cid (Epic cycle)1
- Cid, approximately 1043-10991
- Clare, of Assisi, Saint, 1194-12531