Located in the Museum-Library of the Casa de Bragança (House of Bragança), coming from the music school of the Ducal Chapel. It features libretos of 16th and 19th centuries' operas.

The Ducal Palace was begun in 1501 by the 4th Duke of Braganza, Jaime, and until 1640 was residence of the noble family of the Kingdom's largest. With the Ascension to the throne of the 8th Duke, d. João, the building is only used sporadically until the 19th century. D. Carlos comes to Vila Viçosa frequently and, after the Republic, the last member of the family the King d. Manuel II, decides in her will do there install the Museu da Casa de Bragança. In the Palace are also installed the armoury, the collection of blue and White Porcelain from …