Former Owner
- Laurence Kirby1
- Laurent Campagne1
- Laurentius van der Torqel1
- Lawrence J. Schoenberg5
- Legoué1
- Leonello d'Este, Marquis of Ferrara2
- Lisa Norris Elkins1
- Lorenzo de Olivera1
- Louis César de La Baume Le Blanc1
- Louis H. Silver1
- Ludwig Rosenthal1
- Luigi Cora1
- Luigi Serra di Cassano1
- Luther Albertus Brewer1
- Lutheran Theological Seminary at Philadelphia1
- Lydia Thompson Morris1
- Lyon Cathedral1
- Lālajī Śarmaṇ1
- Maggs Bros Ltd5
- Mahdī ibn Muṣṭafá al-Ḥusaynī1