One of Cascais’ most outstanding palace that is open to the public and exhibits its own grand private collection of over 25,000 book and rarities such as an illustrated book by Duarte Galvao (1455-1517). You can also see works of art from national and foreign artists – paintings – porcelain, etc. Also, most of the pre-historic finds from the Grutas de Alapraia are stored here. These were a series of underground caves only discovered in the late 19th century.