- Lord's Supper--Adoration2
- Lord's prayer2
- Loredano, Leonardo, doge of Venice, 1438-15212
- Love poetry, Latin (Medieval and modern)2
- Luca, Jacopo di2
- Luther, Martin, 1483-15462
- Manuscript maps2
- Manuscripts, Armenian2
- Manuscripts, Greek2
- Maritime law2
- Martini, Cornelia2
- Martini, Giovanni2
- Martini, Roberto2
- Materia medica, Vegetable2
- Medea, consort of Aegeus, King of Athens (Mythological character)2
- Medici, Bernardo d'Alamanno de'2
- Medici, Giovanni de'2
- Medici, Luisa de'2
- Medicinal plants2
- Mediterranean Region2