- Magnificat (Music)1
- Malatesta family1
- Malatesta, Sigismondo Pandolfo, signore di Rimini, 1417-14681
- Mancini, Girolamo, 1832-19241
- Manuscripts, Catalan1
- Manuscripts, Spanish--16th century1
- Manuscripts, Spanish--17th century1
- Marie de Médicis, Queen, consort of Henry IV, King of France, 1573-16421
- Maritime law1
- Martellini, Vincenzio1
- Mary, Blessed Virgin, Saint1
- Materia medica1
- Mathematics1
- Medici family1
- Medici, Alamanno de'1
- Medici, Bernardo d'Alamanno de'1
- Medici, Carlo de'1
- Medici, Francesca de'1
- Medici, Giuliano de', 1453-14781
- Medici, Niccolò de'1