- Bona, Queen, consort of Sigismund I, King of Poland, 1494-15571
- Books of hours1
- Booksellers and bookselling1
- Brescia (Italy). Podestà1
- Brulefer, Etienne, -approximately 14991
- Buildings1
- Buonaccorsi family1
- Buonaccorsi, Constanza1
- Buonaccorsi, Niccolò di Piero1
- Buonaccorsi, Piero1
- Buondelmonte, Piero1
- Busdraghi, Matteo, 14th century1
- Busdraghi, Nicola, 14th century1
- Busdraghi, Piero, 14th century1
- Cabala1
- Calendar reform1
- Calendar, Gregorian1
- Cambrai, League of, 15081
- Canonists1
- Canticles1