Former Owner
- Anderson Galleries1
- Andreas Justus Cennis1
- Andrew Fountaine1
- Angela Burdett-Coutts, 1st Baroness Burdett-Coutts1
- Anna Maria Louisa Peachey1
- Antoine Duprat1
- Antoine Lagnier1
- Antoine de Buz1
- Antoni Jerzy Apponyi1
- Antonio Marino de Caboga1
- Antonius Mensing1
- Artemesia Piccolomini1
- Arthur Liddell, 5th Baron Ravensworth1
- Arthur M. Ellis1
- Ashridge Priory1
- B.S. Cron1
- Baldasarre Boncompagni1
- Barbarigo family1
- Barbe de Laon1
- Basilica of Sant'Ambrogio1