Former Owner
- P. J. De Mat1
- Philip of the Palatinate1
- Phillip J. Pirages Fine Books & Manuscripts1
- Pierre Gélis-Didot1
- Pieter Bondam1
- Pontigny Abbey1
- Prieuré Saint-Louis de Poissy1
- Prince Augustus Frederick, Duke of Sussex1
- Raffaello de’ Medici1
- Raitenhaslach Cistercian Abbey1
- Ralph Verney, 1st Earl Verney1
- Reiss & Son1
- Richard Legh1
- Richard Maria Domville1
- Robert Hoe III1
- Robert de Hangest1
- Rudolf Busch1
- Rudolph B. Gottfried1
- San Giorgio Monastery1
- San Jacopo di Ripoli1