Former Owner
- Lew David Feldman2
- Lewis L. Gould25
- Librairie Damascène Morgand1
- Librairie Tross1
- Library of the Dominicans of Paris1
- Libreria antiquaria Hoepli14
- Libreria antiquaria Mediolanum1
- Libreria la Bibliofila2
- Liechtenstein State Library1
- Lima Public Library4
- Linda Ehrsam Voigts5
- Lionardo di Paolo Adimari1
- Lionel Tollemache, 4th Earl of Dysart2
- Lisa Kiser12
- Lisa Norris Elkins1
- Little family1
- Llanthony Priory1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn2
- Lodi Cathedral1
- Lodovicus Saltariellus1