- Blind tooled (decoration)1
- Blount, Thomas, active 16th century1
- Boards1
- Boccaccio, Giovanni, 1313-13751
- Booksellers' labels1
- Botany, Medical1
- Bourbon, Jacques de, 1370-14381
- Bowyer, William1
- Brass bosses (Binding)1
- Breviary (Catholic Church)1
- Brutus, Marcus Junius, 85 B.C.?-42 B.C.1
- Brutus, the Trojan (Legendary character)1
- Bucolica (Virgil)1
- Buddhist literature, Pali1
- Buddhist monks1
- Burlaeus, Gualterus, 1275-1345?1
- Burlesques1
- Business mathematics1
- Būṣīrī, Sharaf al-Dīn Muḥammad ibn Saʻīd, 1213?-1296? Burdah1
- Calligraphy1