- Binduccio, Pietro di1
- Bishops--Appointment, call, and election1
- Bishops--Temporal power1
- Blank forms1
- Blassori, Petrino1
- Blassori, Ursina1
- Bona, Queen, consort of Sigismund I, King of Poland, 1494-15571
- Bonaccorti, Benozzo1
- Bonanno family1
- Bonini, Marco1
- Bonzi, Maria de1
- Borghi, Piero, -approximately 14941
- Boschi, Giovanni1
- Bosselmini, Lippo de1
- Bourbon, Jacques de, 1370-14381
- Brancacci, Antonio1
- Brancacci, Branca1
- Brancacci, Caterina1
- Branciforte family1
- Brunelleschi, Alderotto de'1