Former Owner
- Matteo Luigi Canonici1
- Maurilio Morazio1
- Michael M. Zagayski1
- Monastero di Santo Spirito in Verona1
- Morris Jastrow, Jr.1
- Noël Pinelli1
- Omaha Public Library1
- Paolo Giovio1
- Paul Gottschalk1
- Pauline Fore Moffitt1
- Pazzi family1
- Peter Eaton1
- Peter Ludwig1
- Philip Augustus Hanrott1
- Philippe II de Croÿ1
- Phoebe Hearst1
- Pietro Millini1
- Rafael Gomes1
- Raoul Chandon de Briailles1
- Richard Heber1