- Mars (Planet)1
- Martellini, Vincenzio1
- Martini, Cornelia2
- Martini, Giovanni2
- Martini, Girolamo1
- Martini, Luca, 1980-1
- Martini, Roberto2
- Martino, Barone di1
- Martino, Vanni di1
- Martyrdom--Islam2
- Marucelli, Benedetto1
- Marucelli, Francesco, 1625-17031
- Mary Magdalene, Saint3
- Mary, Blessed Virgin, Saint31
- Mary, Blessed Virgin, Saint, in the liturgy2
- Mary, Blessed Virgin, Saint, in the liturgy--Orthodox Eastern Church1
- Mary, Queen of Scots, 1542-15872
- Marāḥ al-arwāḥ (Ibn Masʻūd, Aḥmad ibn ʻAlī)6
- Mashāriq al-anwār (Ṣaghānī, al-Ḥasan ibn Muḥammad)3
- Masjid al-Aqṣá (Jerusalem)4