Former Owner
- Mary Augusta Strachey1
- Mary Schell Collins1
- Matteo Luigi Canonici1
- Michel Chasles1
- Michel de Léon1
- Nicolas Antoine Labbey de Billy1
- Nicolas Fowle1
- Otto Orren Fisher1
- Otto Vollbehr1
- Pangracius Chrewczer1
- Paolo Vimercati Sozzi1
- Petrus Giraud1
- Philip Kerr, 11th Marquess of Lothian1
- Philip Robinson1
- Piero Ginori Conti1
- Pierre Fraenkel1
- Pierre Gorman1
- Pietro Civaleri1
- Pietro Giuseppe Ignati Mattei Cattochii1
- Pius XI1