Former Owner
- Arthur M. Elliz1
- Arthur Thomas Bannister1
- Arthur Vershbow2
- Ashridge Priory4
- Ashton Rollins Sanborn1
- Athelstan Riley1
- Audry Wilkens1
- Augustus Pugin1
- Aulne Abbey3
- B. Goussil1
- B.C. Barker-Benfield1
- B.L. Riese1
- B.S. Cron1
- Baldasarre Boncompagni1
- Baldassarre Boncompagni4
- Ball Collection2
- Baptist Union Theological Seminary1
- Barbara Hackenmayrin1
- Barbarigo family1
- Barbe de Laon1