- Martinus, Polonus, -12791
- Martyrologies4
- Martyrs4
- Mary Magdalene, Saint1
- Mary, Blessed Virgin, Saint12
- Mary, Blessed Virgin, Saint, in the liturgy--Orthodox Eastern Church1
- Mary, Queen of Scots, 1542-15872
- Mary, of Bethany, Saint1
- Mashāriq al-anwār (Ṣaghānī, al-Ḥasan ibn Muḥammad)1
- Masnavis, Persian1
- Mass10
- Mass (Music)1
- Mas̲navī (Jalāl al-Dīn Rūmī, Maulana)1
- Materia medica1
- Materia medica, Vegetable1
- Mathematics2
- Mathematics, Arab16
- Mathematics, Greek5
- Maxims1
- Mayenne, Charles de Lorraine, Duc de, 1554-16111