Former Owner
- Paolo Gallo1
- Paolo Guerrini1
- Parroco di Taviano, Luigi Bruno, active 20th century1
- Paul Durrieux1
- Paul Joseph Sachs1
- Paul Sabatier1
- Paul de Berthou1
- Paulus de Graecus1
- Payne and Foss1
- Pedro Ferris1
- Pedro García de Montoya1
- Peter Arrell Brown Widener1
- Peter Christos1
- Petrus Hofstede1
- Petrus Jensenius1
- Petrus Joseph Puccius1
- Petrus Molitor1
- Petrus Ysermans1
- Petrus de Thureyo1
- Pettini Libraria di Antonio Pettini1