 The region is internationally known as a luxury destination for its history as a home of the wealthy, the famous, and European royalty.Both Cascais and Sintra consistently rank among the richest municipalities in Portugal.Cascais's history as a cosmopolitan center originates in the 1870s, when King Luís I of Portugal and the Portuguese royal family made the seaside town his summer residence, thus attracting members of Portugal's aristocracy, who established a summer community there.