- Marriage customs and rites1
- Martinus, Polonus, -12791
- Mary Magdalene, Saint1
- Mass (Music)1
- Mass--Celebration1
- Mathematics, Greek1
- Maxims1
- Medicine, Ancient1
- Medicine, Medieval1
- Medicine--Study and teaching1
- Mehmed II, Sultan of the Turks, 1432-14811
- Mendoza, Antonio de, approximately 1492-15521
- Merovingian scripts1
- Mesgissier, Martin le1
- Metaphysics (Aristotle)1
- Mexico--Chiapas1
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- Mexico--San Juan Teotihuacán1
- Mexico--San Juan Teotihuacán--Teotihuacán Site1