Former Owner
- Louis Bourguet1
- Louis César de La Baume Le Blanc2
- Louis Thompson Rowe1
- Louis XII of France1
- Lucien Magne1
- Ludwig Rosenthal's Antiquariaat1
- Luigi Arrigoni1
- Luigi Celotti5
- Luigi Cora1
- Luigi Serra di Cassano1
- Luis Escobet1
- Lycée Louis-le-Grand1
- M. Favia del Core1
- Maffeo Pinelli1
- Maggs Bros Ltd14
- Mannheimer Hofbibliothek1
- Mannucci family1
- Manuel John Johnson1
- Marcantonio Contarini1
- Marcela Gabriela1