Former Owner
- Philip Robinson1
- Philippe II de Croÿ1
- Phillip J. Pirages Fine Books & Manuscripts1
- Pierre Fraenkel1
- Pierre Tassel1
- Pietro Canal1
- Pietro Giometti1
- Pietro Millini1
- Pietro Odescalchi1
- Poblet Monastery1
- Poor Clares1
- Quinton Edward Gurney1
- R. H. Fenn1
- R. J. Bunck1
- Rabbinical Seminary Vienna1
- Ramón de Mesonero Romanos1
- Raoul Chandon de Briailles1
- Raymond Oliver1
- Reginald Cholmondeley1
- Richard Graves1