Former Owner
- Būtū ʻAbd al-Bāqī1
- Carleton Rubira Richmond1
- Carlo Morbio1
- Carlos José Gutiérrez de los Ríos y Rohan Chabot Fernán-Núñez1
- Cecil Deedes1
- Charles D. Humberd1
- Charles F. Gunther1
- Charles Seymour, 6th Duke of Somerset1
- Charles Stephen Ascherson1
- Charles Stuart, 1st Baron Stuart de Rothesay1
- Collegium Germanicum et Hungaricum1
- Count Johann Nepomuk Wilczek1
- Cox Macro1
- D. Andreas Parisino1
- Dahīʹzādah1
- Damiano Muoni1
- Daniel Itzig1
- Darvīsh Aḥmad Khākiyānī1
- David Solomon Sassoon1
- Dean Putnam Lockwood1