Former Owner
- Philippe II de Croÿ1
- Phillip J. Pirages Fine Books & Manuscripts1
- Pierre Fraenkel1
- Pierre Tassel1
- Pietro Giometti1
- Pietro Giuseppe Ignati Mattei Cattochii1
- Pietro Millini1
- Pietro Odescalchi1
- Pius VI1
- Poblet Monastery1
- Poor Clares1
- Prince Augustus Frederick, Duke of Sussex1
- Prosper Blanchemain1
- Prospero Caffarelli1
- Pîrîzâde, Sayyid ʻAbd Allāh, Shaykh al-Islām1
- Qusṭanṭīn ibn Lūdūlf1
- Qāsim al-Īrawānī1
- R. H. Fenn1
- Rafael Gomes1
- Ramsau Monastery1