Former Owner
- Morris Jastrow, Jr.1
- Oliver Henry Perkins1
- Oliver R. Barrett1
- Otto Jahn1
- Otto Orren Fisher1
- Paland, Irmengarde von1
- Paul Riant1
- Peter Ludwig1
- Philip Hurd1
- Philip Kerr, 11th Marquess of Lothian1
- Philippe Hurault de Cheverny1
- Philippe de Béthune1
- Phyllis Walter Goodhart Gordan1
- Pierre Gélis-Didot1
- Pietro Antonio Crevenna1
- Pietro Giuseppe Ignati Mattei Cattochii1
- Prieuré Saint-Louis de Poissy1
- Prince Augustus Frederick, Duke of Sussex1
- Raoul Léonor Lignerolles1
- Reuschenberg, Margreta von1