- Catholic Church. Diocese of Sigüenza-Guadalajara (Spain)1
- Catholic church buildings1
- Catiline, approximately 108 B.C.-62 B.C.1
- Censures, Ecclesiastical1
- Centerpiece and cornerpiece bindings3
- Certificates3
- Certosa del Galluzzo (Florence, Italy)1
- Chansons de geste2
- Chants1
- Charlemagne, Emperor, 742-8141
- Charts, diagrams, etc.1
- Chaucer, Geoffrey, -14001
- Chess1
- China2
- Choir books1
- Christian ethics4
- Christian ethics--Catholic authors2
- Christian life4
- Christian life--Catholic authors1
- Christian literature, Early1