- Malatesta, Sigismondo Pandolfo, signore di Rimini, 1417-14681
- Mancini, Girolamo, 1832-19241
- Manuscripts, Catalan1
- Manuscripts, German1
- Manuscripts, Greek1
- Manuscripts, Greek (Medieval and modern)1
- Manuscripts, Medical1
- Marbled paper bindings1
- Mariano, Fra1
- Marie de Médicis, Queen, consort of Henry IV, King of France, 1573-16421
- Marino, Giambattista, 1569-16251
- Marital property1
- Marriage1
- Marriage (Canon law)1
- Marriage (Canon law)--Dispensations1
- Marshals1
- Martellini, Vincenzio1
- Martini, Giovanni1
- Martini, Luca, 1980-1
- Marucelli, Benedetto1