- Botany, Medical4
- Bouchet, Jean, 1476-approximately 1558. Balade moralle contre les aveuglez mondainsi1
- Bowyer, William1
- Breviaries3
- Bridles1
- British1
- Buildings1
- Bukhārī, Muḥammad ʻAlī ibn Mubārakshāh, -approximately 1340. Sharḥ Ḥikmat al-ʻayn1
- Bulls, Papal20
- Buonamici, Giovanni Francesco1
- Buondelmonte, Piero1
- Burdah (Būṣīrī, Sharaf al-Dīn Muḥammad ibn Saʻīd)2
- Burhān al-Sharīʻah, Maḥmūd ibn ʻUbayd Allāh, -1274 or 1275. Wiqāyat al-riwāyah10
- Burhān al-Sharīʻah, Maḥmūd ibn ʻUbayd Allāh, d. 1274 or 5. Wiqāyat al-riwāyah5
- Bèze, Théodore de, 1519-16051
- Būnī, Aḥmad ibn ʻAlī, -12251
- Cabala28
- Cairo Genizah3
- Calf bindings4
- California--Berkeley63