Former Owner
- Legoué1
- Leonhardus Cuntius1
- Lisa Norris Elkins1
- Loftus Bland1
- Louis Charles Elson1
- Louis César de La Baume Le Blanc1
- Louis-Jean-Nicolas Monmerqué1
- Ludovico Settala1
- Ludwig Rosenthal1
- Luigi Serra di Cassano1
- Malvezzi de' Medici1
- Manuel John Johnson1
- Marcianus F. Rossi1
- Martin Picker1
- Mary Augusta Strachey1
- Mary Schell Collins1
- Matteo Luigi Canonici1
- Maximilian Henry of Bavaria1
- Merlemont family1
- Michael M. Zagayski1