Former Owner
- Leonello d'Este, Marquis of Ferrara1
- Leonhardus Cuntius1
- Little family1
- Louis César de La Baume Le Blanc1
- Ludovico Settala1
- Lundell Library1
- Maggs Bros Ltd1
- Manuel John Johnson1
- Marcianus F. Rossi1
- Marie de Bretagne d'Avaugour1
- Marie-Caroline of Bourbon-Two Sicilies, Duchess of Berry1
- Marilyn Carbonell1
- Marino Grimani1
- Mary Lusher1
- Matteo Luigi Canonici1
- Matthew Donadski1
- Maximilian Henry of Bavaria1
- Michael M. Zagayski1
- Michiel family1
- Milton Fischmann1