- John Manuel, Prince of Portugal, 1537-15541
- John V, King of Portugal, 1689-17501
- Juana, of Austria, Princess of Portugal, 1535-15731
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611
- Law1
- Letters, Papal1
- Liturgics1
- Lord's Supper1
- Ludwig IV, Holy Roman Emperor, 1282?-13471
- Manuel I, King of Portugal, 1469-15211
- Manuscripts1
- Manuscripts, Arabic1
- Manuscripts, French1
- Manuscripts, German1
- Manuscripts, Hebrew1
- Manuscripts, Italian1
- Manuscripts, Portuguese1
- Marginalia1
- Maria Anna Josefa, Queen, consort of John V, King of Portugal, 1683-17541
- Missions1