Former Owner
- Lucien Graux1
- Lycée Louis-le-Grand1
- Mademoiselle de Malberghe1
- Maffeo Pinelli1
- Mannucci family1
- Marcianus F. Rossi1
- Marco da Bologna1
- Marvin-L. Colker1
- Mary Bloch1
- Matteo Luigi Canonici1
- Matthew Simpson Parkhurst1
- Matthias Corvinus1
- Merlemont family1
- Meschatin La Faye family1
- Michael M. Zagayski1
- Michael Wodhull1
- Michaeliskonvent1
- Michiel family1
- Mikhail Golitsyn1
- Millard Meiss1