Former Owner
- Allan Marquand1
- Allen Johnson1
- Allen Rowland1
- Alonso Mendez de Parada1
- Alpha Loretta Owens1
- Alphaeus N. Andrus1
- Alphonse Labitte7
- Alphonse Pinart3
- Alpirsbach Abbey1
- Alvise Bochini1
- Ambroise Firmin Didot13
- Amelia Anderson Lundell1
- Amelia Daubeney1
- American Art Association1
- American Philosophical Society1
- Amorbach Abbey1
- Ampleforth Abbey2
- Amram ben Avraham Bassel1
- Amīr Bahādur Jank ʻAẓim Allāh Khān1
- Ananda Coomaraswamy1