Former Owner
- Leonello d'Este, Marquis of Ferrara1
- Librairie Tross1
- Lionel Tollemache, 4th Earl of Dysart1
- Lodovicus Saltariellus1
- London School of Jewish Studies1
- Long Island Historical Society, Maine1
- Louis Bourguet1
- Louis Charles Elson1
- Louis Thompson Rowe1
- Louis XII of France1
- Louis XIV of France1
- Lucien Graux1
- Luigi Cora1
- Luini, Pacifico (Franciscan priest), active 19th century1
- M. De La Tour1
- Mademoiselle de Malberghe1
- Marchese Porri-Carcani1
- Margaret Le Seigneur1
- Marguerite of Lorraine1
- Marie Thomas1