Former Owner
- Michiel family1
- Morris Jastrow, Jr.1
- Mortimer Frank1
- Mr. Hals1
- Museo Cavaleri1
- Nancy McGrath1
- Nettie Goldsmith Naumburg1
- Neustift Abbey1
- New York Academy of Medicine1
- Nicolas Antoine Labbey de Billy1
- Notre-Dame monastery (Ambert, France)1
- Oliver Henry Perkins1
- Oliver R. Barrett1
- Omaha Public Library1
- Otto Jahn1
- Otto Orren Fisher1
- Peter Ludwig1
- Philip Hurd1
- Philip Kerr, 11th Marquess of Lothian1
- Philip of the Palatinate1