Former Owner
- Lycée Louis-le-Grand1
- Maffeo Pinelli1
- Mannucci family1
- Marcianus F. Rossi1
- Marco da Bologna1
- Mary Lacaita1
- Matthias Corvinus1
- Menaḥem Naḥum, ha-Leṿi, mi-ḳ.ḳ. Dribin1
- Merlemont family1
- Meschatin La Faye family1
- Michael Kantakouzenos Şeytanoğlu1
- Michael Wodhull1
- Michiel family1
- Millard Meiss1
- Molin1
- Morton Davis Mitchell1
- Mrs. Turnbull1
- Museo Cavaleri1
- Nathaniel Castleton Stephen Poyntz1
- Nathaniel G. Snelling1