- Mass--Celebration1
- Massachusetts1
- Masses1
- Masses, Unaccompanied1
- Mathematics, Jewish1
- Mathematics, Medieval1
- Maurice, Saint, -approximately 2871
- Maximian, Emperor of Rome, approximately 240-3101
- Maḥbūbī, Maḥmūd ibn ʻUbayd Allāh, -1344 or 1345. Wiqāyat al-riwāyah fī masāʼil al-Hidāyah1
- Medical astrology1
- Medicinal plants1
- Medicine, Greek and Roman1
- Medicine, Medieval--Manuscripts1
- Medicine--Manuscripts1
- Medicine--Religious aspects1
- Mediterranean Region1
- Mediterranean Sea--Adriatic Sea1
- Mehmed II, Sultan of the Turks, 1432-14811
- Mekhilta of Rabbi Ishmael1
- Mensural notation1