Former Owner
- Legoué1
- Lehn of Denmark1
- Leigh Baker1
- Leonardo Bruni1
- Leonardo Loredan1
- Leonardus Martinotius1
- Leonhardus Cuntius1
- Leopold Gruber1
- Lepeletier de Rosanbo1
- Leslie Hindman1
- Librairie Damascène Morgand1
- Librairie Tross1
- Library of the Dominicans of Paris1
- Libreria antiquaria Mediolanum1
- Liechtenstein State Library1
- Lionardo di Paolo Adimari1
- Lisa Norris Elkins1
- Little family1
- Llanthony Priory1
- Lodi Cathedral1