- Manuel I, King of Portugal, 1469-15211
- Manuscripts1
- Manuscripts, German1
- Manuscripts, Greek1
- Manuscripts, Greek (Medieval and modern)1
- Manuscripts, Portuguese1
- Maps1
- Maria Anna Josefa, Queen, consort of John V, King of Portugal, 1683-17541
- Massachusetts--Boston1
- Mediterranean Region1
- Missions1
- Mosteiro de S. Mónica (Lisbon, Portugal)1
- Mukhtaṣar al-Muntahá al-uṣūlī (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)1
- Muslim martyrs1
- Muslim pilgrims and pilgrimages1
- Muslims--Conduct of life1
- Netherlands1
- Nile River1
- Odes1
- Odes, Latin (Medieval and modern)1