Former Owner
- Justin MacCarthy Reagh1
- Lawrence J. Schoenberg1
- Louis César de La Baume Le Blanc1
- Luigi Celotti1
- Luigi Serra di Cassano1
- Manuel John Johnson1
- Mary Schell Collins1
- Merlemont family1
- Museo Cavaleri1
- Nettie Goldsmith Naumburg1
- Otto Orren Fisher1
- Paul Riant1
- Philip Kerr, 11th Marquess of Lothian1
- Prince Augustus Frederick, Duke of Sussex1
- R. A. Godwin-Austen1
- Raoul Léonor Lignerolles1
- Rev. Frederick Collins Wilson1
- Robert Lehman1
- Robert de Mol1
- Royal Monastery of Saint Mary of Guadalupe1