Former Owner
- Michel Ferdinand d'Albert d'Ailly1
- Michel Guibé1
- Michel de Léon1
- Michele Amari1
- Middle Hill Rare Books & Manuscripts AB (Stockholm, Sweden)1
- Miguel de Mayora1
- Mikhail Golitsyn1
- Millard Meiss1
- Milt Freudenheim1
- Minerva Kaiser1
- Minnis, Katherine1
- Molin1
- Monasterium sanctorum quadraginta martyrum (Treviso Italy)1
- Monastero di Santo Spirito in Verona1
- Monastery at San Gregorio al Celio1
- Monica Franklyn1
- Monsieur de Bel Air1
- Morell Thurston1
- Moritz Dessauer1
- Morot1