- Masjid al-Aqṣá (Jerusalem)1
- Masjid al-Ḥarām1
- Mass (Music)1
- Materia medica1
- Matthias I, King of Hungary, 1443-14901
- Maydūmī, Muḥammad ibn Muḥammad, -13531
- Mayenne, Charles de Lorraine, Duc de, 1554-16111
- Medici, Alessandro de', 1510-15371
- Medici, Giuliano de', 1453-14781
- Medici, Lorenzo de', 1449-14921
- Medici, Piero di Lorenzo de', 1472-15031
- Medicine, Medieval--Manuscripts1
- Medicine, Persian1
- Medina Sidonia, Alonso Pérez de Guzmán, duque de, 1550-16191
- Medina Sidonia, Juan Alonso de Guzmán, Duque de, -15581
- Medina, Francisco de, 1544-16151
- Memorial books (Holocaust)1
- Menasheh ben Asher, a.b.d. ḳ. Ropshits1
- Menorah1
- Metal clasps1