Former Owner
- Library of the Dominicans of Paris1
- Libreria antiquaria Mediolanum1
- Libri, Edoardo, active 20th century1
- Lisa Norris Elkins1
- Llanthony Priory1
- Lodi Cathedral1
- Lodovicus Saltariellus1
- Loftus Bland1
- Long Island Historical Society, Maine1
- Louis Bourguet1
- Louis II, Count of Flanders1
- Louis Jean Gaignat1
- Louis Loewe1
- Louis Lucien Bonaparte1
- Louis N. Cassett1
- Louis Thompson Rowe1
- Louis XIV of France1
- Louis d'Aumont de Rochebaron1
- Louis d'Harcourt1
- Lucien Delamarre1