Former Owner
- Alexander Beresford Hope1
- Alexander E. Vida1
- Alexander Hamilton, 10th Duke of Hamilton1
- Alexandre de Keller1
- Alfred John Horwood1
- Alfred Trapnell1
- Alfred Tredway White1
- Alfred Woolmer1
- Algerina Peckover1
- Alice M. Taylor1
- Alice Millard1
- Allan Marquand1
- Allen Rowland1
- Alphonse Labitte1
- Alvise Bochini1
- American Art Association1
- Ampleforth Abbey1
- Andrea Matteo Acquaviva1
- Andrea S.1
- Andrea della Valle1