- Biqāʻī, Ibrāhīm ibn ʻUmar, 1406 or 1407-1480. Tahdīm al-arkān1
- Birgivî Mehmet Efendi, approximately 1522-1573. Imtiḥān al-adhkiyāʼ1
- Birmāwī, Muḥammad ibn ʻAbd al-Dāʼim, 1362-1428. Nubdhah al-alfīyah fī al-uṣūl al-fiqhīyah1
- Blood money (Islamic law)1
- Bookkeeping1
- Bosnia and Herzegovina--Sarajevo1
- Bosnian language1
- Botany, Medical1
- Bread1
- Breviaries1
- Bridget, of Sweden, Saint, approximately 1303-13731
- Buddhism1
- Buddhism--Doctrines1
- Buddhist temples--Membership1
- Buhūtī, Manṣūr ibn Yūnus, d. 1641. Dalīl al-ṭālib li-nayl al-maṭālib1
- Building laws (Islamic law)1
- Buildings1
- Bulgaria--Sofia1
- Bullets1
- Bulls, Papal1