Former Owner
- Paul Sabatier1
- Peter Eaton1
- Peter Ludwig1
- Petrus Leonardus1
- Petrus Martinotius1
- Phillip J. Pirages Fine Books & Manuscripts1
- Phoebe Hearst1
- Phyllis Walter Goodhart Gordan1
- Pierre Fraenkel1
- Pieter Bondam1
- Pietro Girometti1
- Pietro Giuseppe Ignati Mattei Cattochii1
- Pietro Millini1
- Prediger (Schwäbisch Gmünd)1
- Prince Augustus Frederick, Duke of Sussex1
- R. F. Pain1
- Rafael Gomes1
- Raffaello de’ Medici1
- Ralph Ewart Ford1
- Ramsau Monastery1