- Buddhism1
- Bulls, Papal20
- Bulqīnī, ʻUmar ibn Raslān, 1324-14031
- Buonanni, Francesco1
- Buonaventura, Caterina1
- Buondelmonti, Giovanni de'1
- Buralis, Jacopo de1
- Burdah (Būṣīrī, Sharaf al-Dīn Muḥammad ibn Saʻīd)4
- Burelli, Bruno1
- Burhān al-Sharīʻah, Maḥmūd ibn ʻUbayd Allāh, -1274 or 1275. Wiqāyat al-riwāyah2
- Burhān al-Sharīʻah, Maḥmūd ibn ʻUbayd Allāh, d. 1274 or 5. Wiqāyat al-riwāyah3
- Cabala20
- Caesarius, of Arles, Saint, 470?-5421
- Cairo Genizah13
- Calandra, Paolo del1
- Calendars2
- Calf bindings8
- California--Berkeley64
- California--San Marino5
- Caliphate1