Former Owner
- Adán Inquaci1
- Albert C. Baugh1
- Albert M. Patrick1
- Albert Parker, 3rd Earl of Morley1
- Albert VII of Mansfeld1
- Alexander Hamilton, 10th Duke of Hamilton1
- Alexis Hübner1
- Alfred Chester Beatty1
- Alfred Cock1
- Alfred E. Hamill1
- Alfred Seymour1
- Algernon Percy, 10th Earl of Northumberland1
- Alphonse Labitte1
- Amorbach Abbey1
- Andrea Tessier1
- Andreas Adelbert Popp1
- Andreas Gross Seiffensieder1
- Andrew Gifford1
- André Le Mercier1
- André Rooryck1