Former Owner
- Alexander Hamilton, 10th Duke of Hamilton1
- Alexander M. Hudnut1
- Alfred Trapnell1
- Allan Marquand1
- Andrea della Valle1
- Andreas Wunder1
- Andrew Fountaine1
- André Le Mercier1
- André Rooryck1
- Angela Burdett-Coutts, 1st Baroness Burdett-Coutts1
- Anna Maria Louisa Peachey1
- Anne of Brittany1
- Annie L. Wiggins1
- Antiquarian Books of Boston1
- Antoine Joseph Rérolle1
- Antoine Lagnier1
- Arnold Jansen op de Haar1
- Artemesia Piccolomini1
- Arthur Brölemann1
- Athelstan Riley1