- Bēssariōn, Cardinal, 1403-14721
- Cabala and Christianity1
- Calendar1
- Calendars1
- Campeggi, Tommaso, 1483-15641
- Canon law--Commentaries1
- Canticles1
- Caracciolo, Antonio, 1515?-15701
- Carretto, Giovanni Francesco1
- Cartularies1
- Castro, João de, 1500-15481
- Catalogs1
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- Catherine, of Siena, Saint, 1347-13801
- Catholic Church. Archdiocese of Breslau (Germany)1
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- Celsus, Saint, -681
- Chaldean rite (Catholic Church)1
- Charity1
- Charles IX, King of France, 1550-15741