Former Owner
- Alfred C. Chapin3
- Alfred Chester Beatty4
- Alfred Henry Huth5
- Alfredo Chavero2
- Algernon Percy, 10th Earl of Northumberland1
- Ali Asghar Antiquatchi1
- Alice Millard1
- Alison Johnstone1
- Allen Johnson1
- Alpha Loretta Owens1
- Alphonse Pinart2
- Ambroise Firmin Didot2
- Amelia Daubeney1
- American Type Founders Company. Typographic Library and Museum2
- Amorbach Abbey1
- Ampleforth Abbey1
- Anderson Galleries1
- Andrea Tessier1
- Andrea della Valle1
- Andreas Gross Seiffensieder1