- Juana, of Austria, Princess of Portugal, 1535-15731
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611
- Law1
- Manuel I, King of Portugal, 1469-15211
- Manuscripts, Latin (Medieval and modern)1
- Manuscripts, Portuguese2
- Maria Anna Josefa, Queen, consort of John V, King of Portugal, 1683-17541
- Meneses, Pedro de, Conde de Vila Real, -14371
- Missions1
- Moriscos1
- Mosteiro de S. Mónica (Lisbon, Portugal)1
- Nautical charts1
- Netherlands1
- Plague1
- Portugal4
- Portugal--Lagos1
- Real property1
- Registers (Lists)1
- Sixteenth century2
- Teodósio, Prince of Portugal, 1634-16531