- Leo XI, Pope, 1535-16051
- Letter writing1
- Limp bindings1
- Lippomano, Luigi, 1500-15591
- Local government--Law and legislation1
- Lord's Supper--Adoration1
- Lord's prayer1
- Love1
- Love poetry, Latin (Medieval and modern)1
- Machiavelli family1
- Malatesta family1
- Malatesta, Sigismondo Pandolfo, signore di Rimini, 1417-14681
- Mancini, Girolamo, 1832-19241
- Manuscripts1
- Manuscripts, Catalan1
- Manuscripts, German1
- Manuscripts, Greek1
- Manuscripts, Greek (Medieval and modern)1
- Mariano, Fra1
- Marriage1