Former Owner
- Lehn of Denmark1
- Leicester Harmsworth1
- Leonardo Loredan1
- Leonardus Martinotius1
- Lew David Feldman1
- Libri, Edoardo, active 20th century1
- Lima Public Library1
- Lodi Cathedral1
- Lodovicus Saltariellus1
- London School of Jewish Studies1
- Lorenzo Antonio da Ponte1
- Louis Bourguet1
- Louis Charles Karpinski1
- Louis XII of France1
- Lucien Magne1
- Lucrezio Palladio degli Olivi1
- Luigi Arrigoni1
- Luigi Clerici1
- Luigi Serra di Cassano1
- M. Favia del Core1