Former Owner
- Julius de Cardelinis1
- Lancino Curti1
- Lathrop C. Harper, Inc.1
- Laura Hurd Motion1
- Leo Olschki1
- Leo S. Olschki Editore1
- Leonardus Martinotius1
- Levi, David, active 19th century1
- London School of Jewish Studies1
- Lorenzo Antonio da Ponte1
- Louis Charles Karpinski1
- Maggs Bros Ltd1
- Marie Cleophe de Sollario1
- Marie de Albano1
- Mary W. T. Dickinson1
- Mazliah Finzi1
- Michael Bernays1
- Monastero di Santo Spirito in Verona1
- Monastery at San Gregorio al Celio1
- Moritz Dessauer1