- 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
- Miftāḥ al-ʻulūm (Sakkākī, Yūsuf ibn Abī Bakr)1
- Mints1
- Missions1
- Monarchy1
- Monastic libraries1
- Monasticism and religious orders for women--Rules1
- Monasticism and religious orders--Rules1
- Montalvan, Alonso de1