- Catherine, of Siena, Saint, 1347-13801
- Catholic Church--Prayers and devotions--Latin--Early works to 18001
- Catholic Church. Archdiocese of Breslau (Germany)1
- Catholic Church. Ordo divini officii (Archdiocese of Mainz : Rhineland-Palatinate, Germany)1
- Chained books1
- Charlemagne, Emperor, 742-8141
- Charts, diagrams, etc.1
- Chess1
- Christian ethics1
- Christian heresies1
- Christian heretics1
- Christian martyrs1
- Christian pilgrims and pilgrimages1
- Christian women1
- Christmas plays1
- Chronology, Historical1
- Colored papers1
- Commandments, Six hundred and thirteen1
- Common law1
- Confession (Canon law)1