- Lemos, Pedro Fernández Ruiz de Castro y Osorio, conde de, active 17th century1
- Lenzi family1
- Letter writing1
- Local government--Law and legislation1
- Logic, Medieval1
- Malatesta family1
- Malatesta, Sigismondo Pandolfo, signore di Rimini, 1417-14681
- Manners and customs1
- Manuscripts, French1
- Manuscripts, Hebrew1
- Marbled paper bindings1
- Martini, Luca, 1980-1
- Mary, Blessed Virgin, Saint1
- Massachusetts--Boston1
- Mathematical recreations1
- Maximus, of Turin, Saint, active 4th century-5th century1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medici, Bernardo d'Alamanno de'1
- Medici, Camillo de'1
- Medici, Carlo Bernardo Alamanni de'1