Former Owner
- 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
- Mary Bloch1
- Matteo Barresi1
- Matthew Simpson Parkhurst1
- Matthias Corvinus1
- Maurice Kann1
- Mayfair Rare Books and Manuscripts1
- Melk Abbey1
- Meschatin La Faye family1
- Michael Wodhull1
- Michaeliskonvent1
- Michel de Léon1
- Middle Hill Rare Books & Manuscripts AB (Stockholm, Sweden)1
- Mikhail Golitsyn1
- Millard Meiss1