Former Owner
- Pius VI1
- Poblet Monastery1
- Poor Clares1
- Prosper Blanchemain1
- Pîrîzâde, Sayyid ʻAbd Allāh, Shaykh al-Islām1
- R. H. Fenn1
- R. J. Bunck1
- Rafael Gomes1
- Ramón de Mesonero Romanos1
- Raoul Chandon de Briailles1
- Raphael Nathan Nata Rabinowitz1
- Rashīdī, Ibrāhīm ibn Yūsuf1
- Reginald Cholmondeley1
- Reuschenberg, Margreta von1
- Ricardo Enrico de Wilde1
- Richard Gough1
- Richard Graves1
- Richard Greene1
- Richard Henry Wilde1
- Richard James Horatio Gottheil1