- Martini, Giovanni1
- Martini, Luca, 1980-1
- Martyn, Henry, 1781-18121
- Martyrdom1
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- Martyrs1
- Marucelli, Benedetto1
- Marucelli, Francesco, 1625-17031
- Mary, Blessed Virgin, Saint, and the church1
- Mary, Blessed Virgin, Saint, in the liturgy1
- Mary, Blessed Virgin, Saint, in the liturgy--Orthodox Eastern Church1
- Mary, of Bethany, Saint1
- Masjid al-Nabawī al-Sharīf1
- Materia medica, Vegetable1
- Mathal al-sāʼir fī adab al-kātib wa-al-shāʻir (Ibn al-Athīr, Ḍiyāʼ al-Dīn Naṣr Allāh ibn Muḥammad)1
- Mathematical instruments1
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- Mathematics--Study and teaching1