Former Owner
- 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
- Marchese Linterno1
- Marchese Porri-Carcani1
- Marcianus F. Rossi1
- Maria Ludovica Favia del Core Borromeo1