- Mattei, Teo1
- Matteo, Bernardo di1
- Matteo, Giovanni di1
- Matthei, Bernardino1
- Maurice, Saint, -approximately 2872
- Maximian, Emperor of Rome, approximately 240-3101
- Maximus, of Turin, Saint, active 4th century-5th century1
- Maḥzor4
- Maḥzor. Yom Kippur1
- Mecco, Francesca di1
- Mecco, Xalento di1
- Medallions (Decorative arts)1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medical education1
- Medici, Bernardo d'Alamanno de'1
- Medici, Giovanni de'2
- Medici, Giovenco de'1
- Medici, Giuliano de'1
- Medici, House of3
- Medici, Lorenzo de', 1449-14921