- Masses1
- Masses, Unaccompanied1
- Mas̲navī (Jalāl al-Dīn Rūmī, Maulana)1
- Mathematical recreations1
- Maurice, Saint, -approximately 2871
- Maximian, Emperor of Rome, approximately 240-3101
- Maximilian I, Holy Roman Emperor, 1459-15191
- Małogoszcz (Poland)1
- Mechanics1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medical astrology1
- Medici, Bastiano de'1
- Medici, Carlo Bernardo Alamanni de'1
- Medici, Elisabetta de'1
- Medici, Fernando de'1
- Medici, Francesca de'1
- Medici, Giuliano de', 1453-14781
- Medici, Giulio de'1
- Medici, Lorenzo de', 1449-14921
- Medici, Niccolò de'1