Former Owner
- Anthelme-Michel-Laurent de Migieu, marquis de Savigny1
- Anthony Askew1
- Antoine-Augustin Renouard1
- Antonio Laserna1
- Antonio Ubaldini1
- Ariel Toaff1
- Arthur Kay1
- August Merz1
- Avraham Yedidiah Levi1
- Aḥmad ibn Mubārak Luṭf Allāh1
- Aḥmad ibn Muṣṭafá1
- Bahman Mirza Qajar1
- Basilica Gößweinstein1
- Bern Dibner1
- Bhaṭṭaṃbhaṭṭa1
- Bibliotheca Philosophica Hermetica1
- Bristol Baptist College1
- Budapest University of Jewish Studies1
- Burg Kreuzenstein1
- Burndy Library1