- Materia medica1
- Mathematics1
- Maxims1
- Mayenne, Charles de Lorraine, Duc de, 1554-16111
- Medical formularies1
- Medici, Alessandro de', 1510-15371
- Medici, House of1
- Medici, Lorenzo de', 1449-14921
- Medicine, Arab1
- Medicine, Magic, mystic, and spagiric1
- Medina Sidonia, Alonso Pérez de Guzmán, duque de, 1550-16191
- Medina Sidonia, Juan Alonso de Guzmán, Duque de, -15581
- Medina, Francisco de, 1544-16151
- Memory1
- Mensural notation1
- Meteorologica (Aristotle)1
- Mexico1
- Middle East--Jerusalem1
- Midrash1
- Miftāḥ al-ʻulūm (Sakkākī, Yūsuf ibn Abī Bakr)1