- Mary, of Bethany, Saint1
- Mass1
- Materia medica1
- Materia medica, Vegetable1
- Mathematical instruments1
- Mayenne, Charles de Lorraine, Duc de, 1554-16111
- Medicinal plants1
- Medina Sidonia, Alonso Pérez de Guzmán, duque de, 1550-16191
- Medina Sidonia, Juan Alonso de Guzmán, Duque de, -15581
- Medina, Francisco de, 1544-16151
- Meditations1
- Mediterranean Sea--Aegean Sea1
- Mekhilta of Rabbi Ishmael1
- Metal clasps1
- Metaphysics (Aristotle)1
- Meteorologica (Aristotle)1
- Mexico--Mexico City1
- Michaelmas1
- Midrash rabbah1
- Midrash rabbah. Exodus1