- Latin letters, Medieval and modern1
- Latin literature1
- Latin poetry1
- Lawyers1
- Learning and scholarship1
- Legal documents1
- Lenzi family1
- Leo X, Pope, 1475-15211
- Leo XI, Pope, 1535-16051
- Letter writing1
- Lippomano, Luigi, 1500-15591
- Local government--Law and legislation1
- Lord's prayer1
- Love poetry, Latin (Medieval and modern)1
- Machiavelli family1
- Malatesta family1
- Malatesta, Sigismondo Pandolfo, signore di Rimini, 1417-14681
- Mancini, Girolamo, 1832-19241
- Manuscripts, Catalan1
- Manuscripts, English1