Former Owner
- Andrés Ordoñez1
- Angela Burdett-Coutts, 1st Baroness Burdett-Coutts1
- Anna Maria Louisa Peachey1
- Anne Baker Lewis55
- Antoine Duprat1
- Antoine Lagnier1
- Antoine de Buz1
- Antoine de Court1
- Antoni Jerzy Apponyi1
- Antonio Marino de Caboga1
- Antonius Mensing1
- Art ancien S.A.5
- Artemesia Piccolomini1
- Arthur H. Lea3
- Arthur Liddell, 5th Baron Ravensworth1
- Arthur M. Ellis1
- Ashridge Priory1
- Aḥmad al-Mudarris1
- B.S. Cron1
- Baldasarre Boncompagni1