- Borghi, Piero, -approximately 14941
- Boschi, Giovanni1
- Bosselmini, Lippo de1
- Botanists1
- Bouchard family1
- Bourbon, Jacques de, 1370-14381
- Bowyer, William1
- Bracciolini, Poggio, 1380-14591
- Bracciolini, Poggio, 1380-1459. Correspondence1
- Brancacci, Antonio1
- Brancacci, Branca1
- Brancacci, Caterina1
- Branciforte family1
- Brescia (Italy). Podestà1
- Breviary (Benedictine : Catholic Church)1
- Bridget, of Sweden, Saint, approximately 1303-13731
- Briefs, Papal1
- Broadsides1
- Brocade bindings1
- Brocade papers1