- Mary, Blessed Virgin, Saint, in the liturgy1
- Mashāriq al-anwār (Ṣaghānī, al-Ḥasan ibn Muḥammad)1
- Masses1
- Masses, Unaccompanied1
- Mas̲navī (Jalāl al-Dīn Rūmī, Maulana)1
- Mathematical recreations1
- Maurice, Saint, -approximately 2871
- Mawrid al-ẓamʼān (Kharrāz, Muḥammad ibn Muḥammad)1
- Maximian, Emperor of Rome, approximately 240-3101
- Maximilian I, Holy Roman Emperor, 1459-15191
- Mayan languages1
- Małogoszcz (Poland)1
- Maḥbūbī, Maḥmūd ibn ʻUbayd Allāh, -1344 or 1345. Wiqāyat al-riwāyah fī masāʼil al-Hidāyah1
- Maḥzor. High Holidays1
- 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