Former Owner
- Prospero Caffarelli1
- Pîrîzâde, Sayyid ʻAbd Allāh, Shaykh al-Islām1
- Qusṭanṭīn ibn Lūdūlf1
- Qāsim al-Īrawānī1
- R. H. Fenn1
- R. J. Bunck1
- Rafael Gomes1
- Ramsau Monastery1
- Ramón de Mesonero Romanos1
- Raphael Nathan Nata Rabinowitz1
- Rashīdī, Ibrāhīm ibn Yūsuf1
- Raymond Oliver1
- Reginald Cholmondeley1
- Reuschenberg, Margreta von1
- Ricardo Enrico de Wilde1
- Richard Gough1
- Richard Graves1
- Richard Greene1
- Richard Henry Wilde1
- Richard James Horatio Gottheil1