Former Owner
- Laurentius van der Torqel1
- Louis Charles Elson1
- Louis H. Silver1
- Lucien Graux1
- Luigi Serra di Cassano1
- Luini, Pacifico (Franciscan priest), active 19th century1
- Lyon Cathedral1
- Mademoiselle de Malberghe1
- Maggs Bros Ltd1
- Margaret of Croy1
- Mark Lansburgh1
- Mary Bloch1
- Mary Schell Collins1
- Michel de Léon1
- Mirmellus Arnandi1
- Moissac Abbey1
- Morton Davis Mitchell1
- Muriel Agnes Fry1
- Nathaniel Sherman Bouton1
- Newman F. McGirr1