- Medici, Lorenzo de', 1449-14921
- Medici, Lorenzo di Pierfrancesco de', 1463-15031
- Medici, Raffaele de'1
- Medici, Vanne de'1
- Medicine, Ancient1
- Medicine, Greek and Roman--Manuscripts1
- Medicine, Magic, mystic, and spagiric1
- Medicine--Study and teaching1
- Mediterranean Sea--Aegean Sea1
- Mehmed II, Sultan of the Turks, 1432-14811
- Mellini, Piero1
- Memory1
- Merlin (Legendary character)1
- Merovingian scripts1
- Metalli, Giuliano1
- Metaphysics (Aristotle)1
- Meteorologica (Aristotle)1
- Methodology1
- Mexico1
- Michaelmas1