- Martino, Barone di1
- Martino, Odino S., active 15th century1
- Martinus, Polonus, -12791
- Martyrologies1
- Mary, Blessed Virgin, Saint, in the liturgy1
- Masjid al-Aqṣá (Jerusalem)1
- Masjid al-Nabawī al-Sharīf1
- Massachusetts1
- Masses1
- Masses, Unaccompanied1
- Massi, Francesca1
- Mathematics, Jewish1
- Mathematics, Medieval1
- Mattei, Teo1
- Matteo, Bernardo di1
- Matteo, Giovanni di1
- Maurice, Saint, -approximately 2871
- Maximian, Emperor of Rome, approximately 240-3101
- Maḥbūbī, ʻUbayd Allāh ibn Masʻūd, -1346 or 1347. Wishāḥ fī al-maʻānī wa-al-bayān1
- Mecco, Francesca di1