Former Owner
- Marco da Bologna1
- Margaret F. Woodward1
- Marguerite de Fontenay1
- Marie Ange-Toussaint Placide de Ferron1
- Marie Cleophe de Sollario1
- Marie de Albano1
- Marie-Caroline of Bourbon-Two Sicilies, Duchess of Berry1
- Marino Grimani1
- Mariota Lyle1
- Martinus Nijhoff1
- Marvin-L. Colker1
- Mary Lacaita1
- Matteo Barresi1
- Matteo Luigi Canonici1
- Matthias Corvinus1
- Maurice Kann1
- Maxwell Sommerville1
- Mayer Sulzberger1
- Mayfair Rare Books and Manuscripts1
- Melk Abbey1