Former Owner
- Leonardo Lapiccirella1
- Libri, Edoardo, active 20th century1
- Lionel Tollemache, 4th Earl of Dysart1
- Lisa Norris Elkins1
- Little family1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Loftus Bland1
- Long Island Historical Society, Maine1
- Louis Thompson Rowe1
- Louis XIV of France1
- Lucien Delamarre1
- Lucien Magne1
- Lucy Evans Chew1
- Ludwig Rosenthal's Antiquariaat1
- Luigi Celotti1
- Luigi Serra di Cassano1
- Lydia Thompson Morris1
- Léon Gruel1
- Madame Théophile Belin1
- Maksymilian Mielzynski1