Former Owner
- Miguel de Mayora1
- Milt Freudenheim1
- Moissac Abbey1
- Monasterio de El Paular1
- Mortimer Loeb Schiff1
- Nathan Comfort Starr1
- Nathaniel Dunbar1
- Nathaniel Sherman Bouton1
- Nicholas Bacon1
- Nonnberg Abbey1
- Novalesa Abbey1
- Oliver Henry Perkins1
- Oliver R. Barrett1
- Otto Vollbehr1
- Parish Church of Waldhausen im Strudengau1
- Park Abbey1
- Pauline Fore Moffitt1
- Peter Ludwig1
- Philip Carteret Webb1
- Philip III the Good1