Former Owner
- Marie-Caroline of Bourbon-Two Sicilies, Duchess of Berry1
- Marienstiftsgymnasium1
- Marino Grimani1
- Mario Maffei1
- Mario Pedro Arata1
- Marion H. Gottfried1
- Marion Lawrence1
- Mariota Lyle1
- Mark Augspürger1
- Markus Fugger1
- Marquis of Astorga1
- Marsden J. Perry1
- Martin Breslauer1
- Martin of Aragon1
- Martinus Nijhoff1
- Mary Augusta Strachey1
- Mary Bloch1
- Mary Elizabeth Holte1
- Mary Lusher1
- Mary Schell Collins1