Former Owner
- Philip Hurd1
- Philip Kerr, 11th Marquess of Lothian1
- Philip Milburn3
- Philip Sills1
- Philippe Hurault de Cheverny1
- Philippe de Béthune1
- Phillip J. Pirages Fine Books & Manuscripts15
- Phyllis Walter Goodhart Gordan1
- Pierleone Leoni1
- Pierre Gorman1
- Pierre Gélis-Didot2
- Pierre Picard le Jeune1
- Pierre Pithou1
- Pierre de La Vacherie1
- Pietro Antonio Crevenna1
- Pius XI1
- Placida Mahl1
- Pontigny Abbey1
- Prieuré Saint-Louis de Poissy1
- Prince Augustus Frederick, Duke of Sussex2