Former Owner
- Adolphe Morlot1
- Adriana R. Salem1
- Adrianus David Schinkel1
- Adán Inquaci1
- Alan G. Thomas1
- Albert Parker, 3rd Earl of Morley1
- Alexander Hamilton, 10th Duke of Hamilton1
- Alexis Hübner1
- Alfonso Cassuto1
- Algernon Percy, 10th Earl of Northumberland1
- Alice Millard1
- Alison Johnstone1
- Alpha Loretta Owens1
- Alphonse Pinart1
- Ambroise Firmin Didot1
- Amelia Daubeney1
- Ampleforth Abbey1
- Anderson Galleries1
- Andrea Tessier1
- Andrea della Valle1