- Boccaccio, Giovanni, 1313-13751
- Boethius, -5241
- Botany, Medical1
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- Bourbon, Jacques de, 1370-14381
- Bowyer, William1
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- Brutus, Marcus Junius, 85 B.C.?-42 B.C.1
- Brutus, the Trojan (Legendary character)1
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- Buddhist literature, Pali1
- Bulls, Papal1
- Burdah (Būṣīrī, Sharaf al-Dīn Muḥammad ibn Saʻīd)1
- Burial laws (Jewish law)1
- Burlaeus, Gualterus, 1275-1345?1
- Burma1
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- Byzantine Empire1
- Caesar, Julius1
- Cakchikel language1