- Lemos, Pedro Fernández de Castro, conde de, 1576-16221
- Letter writing, Hebrew1
- Limp bindings1
- Lippomano, Luigi, 1500-15591
- Liturgies1
- Local officials and employees1
- Lorraine, Nicolas-François, duc de, 1609-16701
- Lucayan Indians1
- Macaronic poetry1
- Macaronic verse1
- Malikites1
- Manuscript fragments1
- Manuscript maps1
- Manuscripts, Aramaic1
- Manuscripts, English1
- Manuscripts, French1
- Manuscripts, Galician1
- Manuscripts, Portuguese1
- Margarita, de Austria, Queen, consort of Philip III, King of Spain, 1584-16111
- Marginalia1