Former Owner
- Miguel de Mayora1
- Millard Meiss1
- Milt Freudenheim1
- Moissac Abbey1
- Monasterio de El Paular1
- Moritz Dessauer1
- Morris H. Morgan1
- Muriel Agnes Fry1
- Nathaniel Castleton Stephen Poyntz1
- Nathaniel Sherman Bouton1
- New York Academy of Medicine1
- Niccolò Perotti1
- Nicholai von Bodeck1
- Nicholas Bacon1
- Nicolas Fowle1
- Nicolaus de Monte Murro1
- Notre-Dame monastery (Ambert, France)1
- Novalesa Abbey1
- Omaha Public Library1
- Orlandus de Fatiis1