- Casini, Ciulla1
- Castello di Rapolano (Rapolano Terme, Italy)1
- Castrucci, Antonio1
- Catherine, of Alexandria, Saint1
- Catholic Church. Archdeaconry of London (England)1
- Catholic Church. Archdiocese of Florence (Italy)1
- Catholic Church. Archdiocese of Pesaro (Italy)1
- Catholic Church. Ordo divini officii (Archdiocese of Mainz : Rhineland-Palatinate, Germany)1
- Catholic Church. Pope1
- Cecchi, Giovannino1
- Cecco, Antonio1
- Cecco, Nato di1
- Censures, Ecclesiastical1
- Centerpiece and cornerpiece bindings1
- Certificates1
- Chained bindings1
- Charles VII, King of France, 1403-14611
- Charles, Duke of Burgundy, 1433-14771
- Charms1
- Chaucer, Geoffrey, -14001