Former Owner
- Paul Riant2
- Paul Sabatier1
- Paul Viollet1
- Peter Le Neve1
- Petrus Giraud1
- Petrus Hofstede1
- Philadelphia Rare Books & Manuscripts Company1
- Philip III the Good1
- Philip Kerr, 11th Marquess of Lothian2
- Philippe de Béthune1
- Phillip J. Pirages Fine Books & Manuscripts5
- Pierre Picard le Jeune1
- Pietro Antonio Crevenna2
- Pius XI1
- Prieuré Saint-Louis de Poissy1
- Prince Augustus Frederick, Duke of Sussex1
- Prosper Blanchemain1
- Quinton Edward Gurney1
- Québriac family1
- R. Stora and Company1