- Manuscripts, Hebrew2
- Manuscripts, Latin (Medieval and modern)1
- Manuscripts, Medieval1
- Manuscripts, Portuguese11
- Manuscripts, Renaissance2
- Manuscripts, Spanish1
- Maria Anna Josefa, Queen, consort of John V, King of Portugal, 1683-17541
- Meneses, Pedro de, Conde de Vila Real, -14371
- Mikveh1
- Missions1
- Monasteries1
- Monasticism and religious orders1
- Mosteiro de S. Mónica (Lisbon, Portugal)1
- Nautical charts1
- Netherlands1
- Netherlands--Amsterdam1
- Piriz, Bento, active 1533-15341
- Plague1
- Poetry1
- Portugal15