- Ludwig IV, Holy Roman Emperor, 1282?-13471
- Manuel I, King of Portugal, 1469-15211
- Manuscript waste1
- Manuscripts, English (Middle)1
- Manuscripts, German1
- Manuscripts, Portuguese1
- Marginalia1
- Maria Anna Josefa, Queen, consort of John V, King of Portugal, 1683-17541
- Mary Magdalene, Saint1
- Mass--Celebration1
- Michigan--Kalamazoo1
- Middle Ages1
- Missions1
- Monastic and religious life of women1
- Monastic and religious life of women--Middle Ages1
- Monastic and religious life--Middle Ages1
- Mosteiro de S. Mónica (Lisbon, Portugal)1
- Motets1
- Music, Greek and Roman1
- Music--Manuscripts1