- Bible. Lamentations1
- Bible. Leviticus1
- Bible. Wisdom of Solomon1
- Binders' tickets1
- Birmāwī, Muḥammad ibn ʻAbd al-Dāʼim, 1362-1428. Nubdhah al-alfīyah fī al-uṣūl al-fiqhīyah1
- Bishops1
- Blaise, Saint, -approximately 3161
- Blessed1
- Boccaccio, Giovanni, 1313-13751
- Booksellers' labels1
- Borders, Ornamental (Decorative arts)1
- Bracciolini, Poggio, 1380-14591
- Brocade bindings1
- Brudenell family1
- Brulefer, Etienne, -approximately 14991
- Brutus, Marcus Junius, 85 B.C.?-42 B.C.1
- Brutus, the Trojan (Legendary character)1
- Buddhism1
- Buonaccorsi family1
- Buonaccorsi, Constanza1