Former Owner
- Library of the Dominicans of Paris1
- Libreria la Bibliofila1
- Libri, Edoardo, active 20th century1
- Lisa Norris Elkins1
- Little family1
- Llanthony Priory1
- Lodi Cathedral1
- Lodovicus Saltariellus1
- Long Island Historical Society, Maine1
- Louis Bourguet1
- Louis II, Count of Flanders1
- Louis Thompson Rowe1
- Louis XIV of France1
- Louis d'Harcourt1
- Louis-Jean-Nicolas Monmerqué1
- Lucien Delamarre1
- Lucien Gougy1
- Lucien Magne1
- Ludovico Settala1
- Ludwig Rosenthal1