Former Owner
- Leopold Gruber1
- Levi, David, active 19th century1
- Lionardo di Paolo Adimari1
- Lionel Tollemache, 4th Earl of Dysart1
- Louis César de La Baume Le Blanc1
- Louis N. Cassett1
- Louis-Jean-Nicolas Monmerqué1
- Ludovic Damas Froissart1
- Ludovico Settala1
- Luigi Celotti1
- Luini, Pacifico (Franciscan priest), active 19th century1
- Luis Fernández de Córdoba y Aragón1
- Lyon Cathedral1
- M. Haimmiller1
- Madeleine Cosman1
- Malachia Ormanian1
- Malvezzi de' Medici1
- Manūchihr Nukhastīn Āṣaf Qājār1
- Manṣūr, Abū al-Faz̤l ibn Ghiyāth al-Dīn1
- Mario Maffei1