- Manuel I, King of Portugal, 1469-15211
- Manuscript maps1
- Manuscripts, Latin (Medieval and modern)1
- Manuscripts, Medieval1
- Manuscripts, Spanish1
- Maria Anna Josefa, Queen, consort of John V, King of Portugal, 1683-17541
- Missions1
- Monasteries1
- Monasticism and religious orders1
- Mosteiro de S. Mónica (Lisbon, Portugal)1
- Nautical charts1
- Netherlands1
- Piriz, Bento, active 1533-15341
- Plague1
- Poetry1
- Portugal--Lagos1
- Portugal--Lisbon1
- Portuguese literature1
- Portuguese poetry1
- Portuguese poetry--Classical period1