Former Owner
- Lutheran Theological Seminary at Philadelphia1
- Lydia Thompson Morris2
- Maggs Bros Ltd2
- Maksymilian Mielzynski1
- Manuel John Johnson1
- Marc-René de Voyer d'Argenson1
- Marcantonio Contarini1
- Marcela Gabriela1
- Marco da Bologna1
- Margaret Le Seigneur1
- Marguerite of Lorraine1
- Mary Schell Collins1
- Mary W. T. Dickinson2
- Mary, Queen of Scots1
- Matteo Luigi Canonici1
- Matthias Corvinus1
- Menno Hertzberger1
- Merlemont family1
- Messieurs Du Trieu2
- Michael Tomkinson1