Former Owner
- Marchese Porri-Carcani1
- Marco Antonio Morosini1
- Marie Cleophe de Sollario1
- Marie de Albano1
- Marilyn Carbonell1
- Mario Maffei1
- Martin Breslauer1
- Matteo Barresi1
- Mayfair Rare Books and Manuscripts1
- Melk Abbey1
- Michael Tomkinson1
- Michel Chasles1
- Michel Ferdinand d'Albert d'Ailly1
- Middle Hill Rare Books & Manuscripts AB (Stockholm, Sweden)1
- Monastery of San Bartolmeo, Arezzo, Tuscany1
- Moritz Dessauer1
- Morris Jastrow, Jr.1
- Nanna Corbinello1
- Nathaniel Sherman Bouton1
- Nicholai von Bodeck1