- Buondelmonti, Giovanni de'1
- Buralis, Jacopo de1
- Burdah (Būṣīrī, Sharaf al-Dīn Muḥammad ibn Saʻīd)2
- Burelli, Bruno1
- Burhān al-Sharīʻah, Maḥmūd ibn ʻUbayd Allāh, -1274 or 1275. Wiqāyat al-riwāyah1
- Burial laws (Jewish law)1
- Burma1
- Byzantine Empire5
- Byzantine literature1
- Béla IV, King of Hungary, 1206-12701
- Bālisī, Abū Bakr ibn Qiwām, -12601
- Cabala2
- Cacciaguerra, Renaldus1
- Caesar, Julius5
- Cafsuto, Moisè Vita, active 18th century1
- Calandra, Paolo del1
- Calendar1
- Calendars4
- Calera, Rodrigo1
- Calf bindings9