Former Owner
- Luigi Serra di Cassano1
- Luini, Pacifico (Franciscan priest), active 19th century1
- Luis Escobet1
- Luis Fernández de Córdoba y Aragón1
- Luis Mayora1
- Luis Ordoñez1
- Lundell Library1
- Luther Albertus Brewer1
- Lutheran Theological Seminary at Philadelphia1
- Lyon Cathedral1
- Léon Gruel1
- Léon Techener1
- Lālajī Śarmaṇ1
- L’Art Ancien1
- M. De La Tour1
- M. Favia del Core1
- M. Haimmiller1
- M. Lee1
- M. Louise Stowell1
- M. Pierre Guarin1