- Manuel I, King of Portugal, 1469-15211
- Manuscripts1
- Manuscripts, Arabic1
- Manuscripts, Hebrew1
- Manuscripts, Portuguese1
- Manuscripts, Turkish1
- Maria Anna Josefa, Queen, consort of John V, King of Portugal, 1683-17541
- Missions1
- Mosteiro de S. Mónica (Lisbon, Portugal)1
- Netherlands1
- New Jersey--Princeton1
- Plague1
- Portugal1
- Portugal--Lagos1
- Registers (Lists)1
- Samarqandī, Abū al-Qāsim ibn Abī Bakr, active 15th century. Risālah al-Samarqandīyah fī al-istiʻārāt1
- Spain--Aragon1
- Specimens1
- Teodósio, Prince of Portugal, 1634-16531
- Torah scrolls1