Former Owner
- Libri, Edoardo, active 20th century1
- Liechtenstein State Library1
- Lionardo di Paolo Adimari1
- Lionel Tollemache, 4th Earl of Dysart1
- Little family1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Lodovicus Saltariellus1
- Long Island Historical Society, Maine1
- Lorenzo Antonio da Ponte1
- Louis Bourguet1
- Louis Jean Gaignat1
- Louis Thompson Rowe1
- Louis XIV of France1
- Louis d'Aumont de Rochebaron1
- Lucien Graux1
- Lucien Magne1
- Lucy Evans Chew1
- Luigi Clerici1
- Luigi Cora1
- Luis Mayora1