Former Owner
- Admont Abbey1
- Albert Parker, 3rd Earl of Morley1
- Alexander Hamilton, 10th Duke of Hamilton1
- Alexis Hübner1
- Alfredo Chavero1
- Alison Johnstone1
- Alphonse Pinart1
- Andrea della Valle1
- Andreas Weiss1
- Andrew Gifford1
- André Rooryck1
- Anthony Askew1
- Arthur Annesley, 1st Earl of Anglesey1
- Arthur Brölemann1
- Aulne Abbey1
- Baldassarre Boncompagni1
- Bartholus Blancellus1
- Battle Abbey1
- Bern Dibner1
- Bernard M. Rosenthal1