Former Owner
- Pietro Giuseppe Ignati Mattei Cattochii1
- Pietro Millini1
- Pius XI1
- Poblet Monastery1
- Pîrîzâde, Sayyid ʻAbd Allāh, Shaykh al-Islām1
- Quinton Edward Gurney1
- Rafael Gomes1
- Raphael Nathan Nata Rabinowitz1
- Reuschenberg, Margreta von1
- Richard Halter1
- Richard Heber1
- Richard James Horatio Gottheil1
- Richard Rich1
- Robert Churchill1
- Robert Dechert1
- Robert Lenkiewicz1
- Robert Neville1
- Robert de Mol1
- S. Ereilter1
- Sam Schaefler1