- Maḥzor. High Holidays1
- Meat inspection (Jewish law)1
- Medical formularies1
- Medici, Alessandro de', 1510-15371
- Medici, House of1
- Medici, Lorenzo de', 1449-14921
- Medicinal plants1
- Medicine13
- Medicine, Ancient1
- Medicine, Arab1
- Medicine, Magic, mystic, and spagiric2
- Medicine, Medieval3
- Medina Sidonia, Alonso Pérez de Guzmán, duque de, 1550-16191
- Medina Sidonia, Juan Alonso de Guzmán, Duque de, -15581
- Medina, Francisco de, 1544-16151
- Meditations8
- Memory1
- Meneses, Pedro de, Conde de Vila Real, -14371
- Mensural notation10
- Merovingian scripts1