Former Owner
- Anne of Brittany1
- Anthony Askew1
- Antoine-Augustin Renouard1
- Antoni Jerzy Apponyi1
- Antonio Dominico Restis1
- Antonio Lauro1
- Antonio Marino de Caboga1
- Antonio Saverio Gentili1
- Antonio Ubaldini1
- Antonius Mensing1
- Arno M. Voynich1
- Artemesia Piccolomini1
- Arthur Vershbow1
- Assemani family1
- Barbarigo family1
- Bartolomeo Amici1
- Basilica of Sant'Ambrogio1
- Beatrice de Fouar1
- Beatus Rhenanus1
- Bern Dibner1