Former Owner
- Arnold Mettler1
- Athelstan Riley1
- B.C. Barker-Benfield1
- B.S. Cron1
- Baldassarre Boncompagni1
- Benediktinerinnenabtei St. Walburg1
- Bentley Lyonel John Tollemache, 3rd Baron Tollemache1
- Bergendal Collection1
- Bernard M. Rosenthal1
- C. W. S. Dixon1
- Caesareum Societatis Jesu Collegium Viennense1
- Carlo Morbio1
- Charles Alexander de Cosson1
- Charles E. Roseman Jr.1
- Charles Hurleston1
- Charles Kothen1
- Charles Marriette1
- Charles Singer1
- Charles Stephen Ascherson1
- Chartreuse Saint-Sixte de Rettel1