- Manuscripts, Catalan1
- Manuscripts, Greek1
- Manuscripts, Hebrew1
- Marginalia1
- Marie de Médicis, Queen, consort of Henry IV, King of France, 1573-16421
- Marriage1
- Martellini, Vincenzio1
- Martini, Giovanni1
- Martini, Luca, 1980-1
- Mathematical recreations1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medical education1
- Medici, Bernardo d'Alamanno de'1
- Medici, Bernardo de'1
- Medici, Carlo de'1
- Medici, Francesca de'1
- Medici, Niccolò de'1
- Medici, Ottavia Altoviti1
- Medici, Vincenzo de'1
- Medicine, Arab1