- Mary Magdalene, Saint1
- Mass--Celebration1
- Massacre of the Holy Innocents in art1
- Masses1
- Masses, Unaccompanied1
- Mathematical recreations1
- Mathematics1
- Mathematics, Greek1
- Maximus, of Turin, Saint, active 4th century-5th century1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medical education1
- Medici, Alamanno de'1
- Medici, Bernardo d'Alamanno de'1
- Medici, Camillo de'1
- Medici, Carlo Bernardo Alamanni de'1
- Medici, Lorenzo de', 1449-14921
- Medicine, Arab1
- Medicine, Magic, mystic, and spagiric1
- Medicine, Medieval1
- Medicine--Manuscripts1