Former Owner
- Libri, Edoardo, active 20th century1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Lodovicus Saltariellus1
- Louis Bourguet1
- Louis Thompson Rowe1
- Louis XII of France1
- Lucien Magne1
- Ludwig Rosenthal's Antiquariaat1
- Luigi Arrigoni1
- Luigi Cora1
- Luigi Serra di Cassano1
- Luis Escobet1
- Lycée Louis-le-Grand1
- M. Favia del Core1
- Maffeo Pinelli1
- Mannheimer Hofbibliothek1
- Mannucci family1
- Manuel John Johnson1
- Marcantonio Contarini1
- Marcela Gabriela1