Former Owner
- Otto Jahn1
- Otto Orren Fisher1
- Pangracius Chrewczer1
- Paolo Vimercati Sozzi1
- Philip Kerr, 11th Marquess of Lothian1
- Piero Ginori Conti1
- Pierre Fraenkel1
- Pietro Civaleri1
- Pietro Giuseppe Ignati Mattei Cattochii1
- Pius VI1
- Prince Augustus Frederick, Duke of Sussex1
- Prospero Caffarelli1
- Rinaldo Ridolfini1
- Robert Brodhead Honeyman1
- Robert Hoe III1
- Robert Neville1
- Robert de Mol1
- Rudolphus Rasser Donatus1
- Samuel Allan1
- Santi Giovanni e Paolo1