Former Owner
- Peterborough Central Library1
- Petrus Giraud1
- Petrus Joseph Puccius1
- Petrus Molitor1
- Petrus de Thureyo1
- Philadelphia Museum of Art1
- Philip Carteret Webb1
- Philip III the Good1
- Philip Kerr, 11th Marquess of Lothian1
- Philip Robinson1
- Phillip J. Pirages Fine Books & Manuscripts1
- Phoebe Hearst1
- Pierleone Leoni1
- Pierre Fraenkel1
- Pietro Canal1
- Pietro Giometti1
- Pietro Giuseppe Ignati Mattei Cattochii1
- Pietro Millini1
- Pietro Odescalchi1
- Pius VI1