- Medici, Lorenzo de', 1449-14921
- Medicine, Greek and Roman--Manuscripts1
- Medicine, Magic, mystic, and spagiric1
- Medicine, Medieval1
- Mehmed II, Sultan of the Turks, 1432-14811
- Metal clasps1
- Meteorologica (Aristotle)1
- Meteorology1
- Middle East--Palestine1
- Military campaigns1
- Military history, Medieval1
- Miniature books1
- Miracles1
- Monarchy1
- Monasteries1
- Monasterio de San Jerónimo de Monte Olivete (Sant Pere de Ribes, Spain)1
- Monasterio de San Jerónimo de la Murtra (Badalona, Spain)1
- Monasterio de San Jerónimo del Valle de Hebrón (Barcelona, Spain)1
- Monastic and religious life of women1
- Monastic and religious life--Early church1