- Medici, Fernando de'1
- Medici, Francesca de'1
- Medici, Giulio de'1
- Medici, Nicolo de'1
- Medici, Ottavia Altoviti1
- Medici, Piero di Lorenzo de', 1472-15031
- Medicinal plants1
- Medicine, Arab1
- Medicine, Magic, mystic, and spagiric1
- Medicine, Medieval1
- Medicine--Study and teaching1
- Meditations1
- Meistersinger1
- Melanchthon, Philip, 1497-1560. De officio principum1
- Memory1
- Meteorologica (Aristotle)1
- Metochites, Theodoros, 1270-13321
- Mexico1
- Middle East--Jerusalem1
- Middle East--Jerusalem (Latin Kingdom)1