Former Owner
- Matteo Luigi Canonici1
- Maximilian Henry of Bavaria1
- Melk Abbey1
- Michel Chasles1
- Michel de Léon1
- Morris Jastrow, Jr.1
- Nicolas Antoine Labbey de Billy1
- Nicolas Fowle1
- Otto Ege1
- Otto Jahn1
- Otto Orren Fisher1
- Otto Vollbehr1
- Paland, Irmengarde von1
- Pangracius Chrewczer1
- Paul Grinke1
- Petrus Giraud1
- Philip Kerr, 11th Marquess of Lothian1
- Philip Robinson1
- Piero Ginori Conti1
- Pierre Fraenkel1