Former Owner
- Michiel family1
- Miguel de Mayora1
- Millard Meiss1
- Milt Freudenheim1
- Moissac Abbey1
- Monasterio de El Paular1
- Morris H. Morgan1
- Mortimer Frank1
- Muriel Agnes Fry1
- Murray Anthony Potter1
- Nathaniel Castleton Stephen Poyntz1
- Nathaniel Sherman Bouton1
- Neustift Abbey1
- New York Academy of Medicine1
- Niccolò Perotti1
- Nicholas Bacon1
- Nicolas Antoine Labbey de Billy1
- Nicolas Fowle1
- Nicolaus Pol1
- Nicolaus de Monte Murro1