- Manuscripts, Occitan1
- Manuscripts, Samaritan1
- Manār al-anwār fī al-uṣūl (Nasafī, ʻAbd Allāh ibn Aḥmad)1
- Mariano, Fra1
- Marriage (Roman law)1
- Martini, Giovanni1
- Martini, Luca, 1980-1
- Marucelli, Benedetto1
- Marucelli, Francesco, 1625-17031
- Mary Magdalene, Saint1
- 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