Former Owner
- Philadelphia Rare Books & Manuscripts Company1
- Philip C. Duschnes1
- Philip C. Duschnes Rare Books & First Editions1
- Philip Hofer1
- Pierre Pithou1
- Poor Clares1
- Québriac family1
- Ramsau Monastery1
- Raoul Chandon de Briailles1
- Renzo Rizzi libri antichi1
- Richard Priestley1
- Robert Forrer1
- Robert Lyle1
- Robert de Hangest1
- Rudolf Busch1
- Saint-Amand Abbey1
- Samuel Petit1
- San Barnaba Church1
- San Cristoforo alla Certosa (Church : Ferrara, Italy)1
- San Francesco1