Former Owner
- Arthur Kay1
- Arthur Lee Loeb1
- Arthur Liddell, 5th Baron Ravensworth1
- Ashridge Priory1
- Athelstan Riley1
- August Merz1
- Augustinus de Cagnolis1
- Augustus Pugin1
- Austin, Jehan1
- Aḥmad ibn Mubārak Luṭf Allāh1
- Aḥmad ibn Muṣṭafá1
- B.C. Barker-Benfield1
- Bahman Mirza Qajar1
- Baldassarre Boncompagni4
- Baptist Union Theological Seminary1
- Baron Paul Adolphe Dieudonné Thiébault1
- Bartholus Blancellus1
- Bartolomeo di Larione Martelli1
- Basilica of Santa Maria Novella1
- Basilios Bessarion1