- Brulefer, Etienne, -approximately 14991
- Brutus, the Trojan (Legendary character)1
- Buckland Abbey (England)1
- Busdraghi, Matteo, 14th century1
- Busdraghi, Nicola, 14th century1
- Busdraghi, Piero, 14th century1
- Business mathematics1
- Byzantine literature1
- Cabala1
- Calendar1
- Calligraphy, German1
- Cambrai, League of, 15081
- Canonists1
- Cardinals--Biography1
- Catherine, of Siena, Saint, 1347-13801
- Catholic Church. Archdiocese of Breslau (Germany)1
- Catholic Church. Archdiocese of Reims (France)1
- Catholic Church. Collegium Cardinalium1
- Cecco, d'Ascoli, 1269-13271
- Censures, Ecclesiastical1