Former Owner
- Aḥmad Rifʻat ibn al-Ḥājj Muḥammad Fākhir Z̤amāqavī1
- Aḥmad ibn Mubārak Luṭf Allāh1
- Aḥmad ibn Muḥammad ibn Ṣalāḥ al-Sharafī1
- Aḥmad ibn Muṣṭafá1
- Aḥmad ibn ʻUmar Afandī1
- B.C. Barker-Benfield1
- Bahman Mirza Qajar1
- Baldasarre Boncompagni1
- Baldassarre Boncompagni5
- Baptist Union Theological Seminary1
- Baron Paul Adolphe Dieudonné Thiébault1
- Bartholus Blancellus1
- Bartolomeo di Larione Martelli1
- Basilica Gößweinstein1
- Basilica of Santa Maria Novella1
- Basilios Bessarion1
- Battle Abbey1
- Baḥrānī, Muḥammad ibn ʻAlī ibn Ḥaydar ibn Ḥasan ibn Ḥaydar1
- Benediktinerinnenabtei St. Walburg1
- Benetto Spinelli1