Former Owner
- Luis Escobet1
- Lycée Louis-le-Grand1
- Maffeo Pinelli1
- Manoel Pereira da Sylva1
- Marco da Bologna1
- Marie-François Duchesne de Beaumanoir1
- Mathias Schurer1
- Matteo Luigi Canonici1
- Matthew Simpson Parkhurst1
- Matthias Corvinus1
- Merlemont family1
- Meschatin La Faye family1
- Michael Kantakouzenos Şeytanoğlu1
- Michael M. Zagayski1
- Michael Wodhull1
- Michaeliskonvent1
- Michiel family1
- Millard Meiss1
- Molin1
- Monasterium sanctorum quadraginta martyrum (Treviso Italy)1