Former Owner
- Marchese Porri-Carcani1
- Marie Cleophe de Sollario1
- Marie de Albano1
- Marie-Caroline of Bourbon-Two Sicilies, Duchess of Berry1
- Marino Grimani1
- Martin Breslauer1
- Mathias Schurer1
- Matthias Corvinus1
- Maurice Kann1
- Mercantile Library Company1
- Michael Wodhull1
- Mikhail Golitsyn1
- Millard Meiss1
- Molin1
- Monasterium sanctorum quadraginta martyrum (Treviso Italy)1
- Murray Anthony Potter1
- Nathaniel Sherman Bouton1
- Niccolò Albergati1
- Nicolai Briganti1
- Nicolaus de Monte Murro1