- Marucelli, Benedetto1
- Marucelli, Francesco, 1625-17031
- Mary Magdalene, Saint3
- Mary, Blessed Virgin, Saint62
- Mary, Blessed Virgin, Saint, in the liturgy2
- Mary, Blessed Virgin, Saint, in the liturgy--Orthodox Eastern Church1
- Mary, Queen of Scots, 1542-15871
- Mary, of Bethany, Saint1
- Mary,--Blessed Virgin, Saint2
- Marāḥ al-arwāḥ (Ibn Masʻūd, Aḥmad ibn ʻAlī)5
- Masjid al-Aqṣá (Jerusalem)1
- Masorah1
- Mass1
- Mass--Celebration1
- Massacre of the Holy Innocents in art1
- Massaran, Isaac de1
- Massi, Francesca1
- Materia medica11
- Materia medica, Vegetable4
- Mathematical instruments1