Former Owner
- Louis César de La Baume Le Blanc1
- Louis-Jean-Nicolas Monmerqué1
- Ludovico Settala1
- Luigi Celotti1
- Luis Fernández de Córdoba y Aragón1
- Madeleine Cosman1
- Malachia Ormanian1
- Malvezzi de' Medici1
- Manūchihr Nukhastīn Āṣaf Qājār1
- Mario Maffei1
- Mark Lansburgh1
- Markus Fugger1
- Mary Augusta Strachey1
- Mary Schell Collins1
- Maximilian Henry of Bavaria1
- Mayer Sulzberger1
- Mazliah Finzi1
- Melk Abbey1
- Michel Chasles1
- Michel de Léon1