Former Owner
- Paul Joseph Sachs1
- Paulus de Graecus1
- Pedro García de Montoya1
- Petrus Giraud1
- Petrus Hofman Peerlkamp1
- Petrus Hofstede1
- Petrus Molitor1
- Pettini Libraria di Antonio Pettini1
- Philadelphia Museum of Art1
- Philip Augustus Hanrott1
- Philip C. Duschnes1
- Philip C. Duschnes Rare Books & First Editions1
- Philip Robinson1
- Philippe Desportes1
- Pierre Fraenkel1
- Pierre Gorman1
- Pierre Pithou1
- Pietro Bembo1
- Pius XI1
- Poblet Monastery1