Former Owner
- Pietro1
- Pietro Antonio Crevenna1
- Pietro Bembo1
- Pietro Giometti1
- Pius VI1
- Poblet Monastery1
- Poor Clares1
- Prince Augustus Frederick, Duke of Sussex3
- Prospero Caffarelli1
- Pugliese1
- Québriac family1
- R. A. Godwin-Austen1
- R. H. Fenn1
- R. Stora and Company1
- Raoul Léonor Lignerolles1
- Rashīdī, Ibrāhīm ibn Yūsuf1
- Renzo Rizzi libri antichi1
- René Antoine Thoué1
- Rev. Frederick Collins Wilson1
- Ricardo, Conde de Benahavis Heredia1