Former Owner
- Leonardo Lapiccirella2
- Librairie Damascène Morgand2
- Libreria la Bibliofila2
- Lindwer, Willy2
- Lionel Tollemache, 4th Earl of Dysart2
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn2
- Louis de Gruuthuse2
- Lucien Gougy2
- Lucy Evans Chew2
- Ludwig Rosenthal's Antiquariaat2
- Luigi Arrigoni2
- Luigi Cora2
- Lycée Louis-le-Grand2
- Marchese Linterno2
- Marie-François Duchesne de Beaumanoir2
- Marilyn Carbonell2
- Martin Schøyen2
- Mary Lacaita2
- Melk Abbey2
- Messieurs Du Trieu2