- Catholic Church. Archdiocese of Pesaro (Italy)1
- Catholic Church. Archdiocese of Siena (Italy)2
- Catholic Church. Diocese of Pistoia (Italy)2
- 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
- Charlemagne, Emperor, 742-81418
- Charles VII, King of France, 1403-14611
- Charles, Duke of Burgundy, 1433-1477--Sources1
- Charms1
- Charters11
- Charts, diagrams, etc.7
- Chaucer, Geoffrey, -14001
- Chelli, Marco1