Former Owner
- Lisa Norris Elkins1
- Lorenzo de Olivera1
- Louis César de La Baume Le Blanc1
- Louis H. Silver1
- Ludwig Rosenthal1
- Luigi Cora1
- Luigi Serra di Cassano1
- Luini, Pacifico (Franciscan priest), active 19th century1
- Luther Albertus Brewer1
- Lutheran Theological Seminary at Philadelphia1
- Lydia Thompson Morris1
- Lyon Cathedral1
- Lālajī Śarmaṇ1
- Madame Théophile Belin1
- Maggs Bros Ltd5
- Mahdī ibn Muṣṭafá al-Ḥusaynī1
- Maksymilian Mielzynski1
- Marchese Porri-Carcani1
- Margaret Le Seigneur1
- Margaret of Croy1