- Blind stamped bindings1
- Bonaccorti, Benozzo1
- Bonyngton, John1
- Booksellers and bookselling1
- Booksellers' copies1
- Booth, William1
- Borghi, Piero, -approximately 14941
- Boschi, Giovanni1
- Botany, Medical1
- Bourbon, Jacques de, 1370-14381
- Bracciolini, Poggio, 1380-14591
- Brancacci, Antonio1
- Brancacci, Branca1
- Brancacci, Caterina1
- Brass clasps1
- Breviary (Benedictine : Catholic Church)1
- Bridget, of Sweden, Saint, approximately 1303-13731
- Brunelleschi, Alderotto de'1
- Brunelleschi, Antonia1
- Brunelleschi, Betto de'1