Former Owner
- Henry Probasco1
- Henry Stevens1
- Henry White1
- Homer Lewis Bartlett2
- Ioannes Morezenos1
- Isaac Foot3
- James Lyell1
- Johann Heinrich van Ess1
- Johann Heinrich von Speyr-Passavant1
- John Henry Nash1
- John Hinsdale Scheide3
- José Esteve Juan1
- Karl Wilhelm Hiersemann1
- Lathrop Colgate Harper2
- Lawrence J. Schoenberg1
- Leo Olschki1
- Leonhardus Cuntius1
- Louis-Jean-Nicolas Monmerqué1
- Maggs Bros Ltd1
- Monastery at San Gregorio al Celio1