National Museum of Ancient Art

The Museu Nacional de Arte Antiga (Portuguese pronunciation: [muˈzeu nɐsiuˈnaɫ dɨ ˈaɾt(ɨ) ɐ̃ˈtiɡɐ]), located in Lisbon, is the most important art museum in Portugal as well as being among the most important in Europe.

The museum is known as MNAA (in English, National Museum of Ancient Art), and is popularly known as the Museu das Janelas Verdes (Green Windows Museum) due to the color of its windows. It is located in the Palácio de Alvor-Pombal, a former palace of the Count of Alvor, later purchased by the Marquis of Pombal.

It is the best museum in which to understand the development of Portuguese art prior to the early nineteenth century.