Álvaro Joaquim de Melo Siza Vieira GOSE GCIH GCIP (born 25 June 1933) is a Portuguese architect, and architectural educator.

Completed in 1966, both of the two swimming pools (one for children, the other for adults) as well as the building with changing rooms and a cafe are set into the natural rock formation on the site with unobstructed views of the sea.

Most of his best known works are located in his hometown Porto: the Boa Nova Tea House (1963), the Faculty of Architecture (1987–93), and the Serralves Museum of Contemporary Art (1997).

Commissioned after winning an international competition in 2010, Siza and Granada-based Juan Domingo Santos unveiled designs for a new entrance and visitors center at the Alhambra in 2014.

[4] In July 2014 Siza announced his decision to donate the large part of his architectural archive to the Canadian Centre for Architecture (CCA) in Montreal, Quebec, Canada, in order to make his materials "accessible alongside the work of other modern and contemporary architects",[13] while also giving specific project archives to the Fundação Gulbenkian in Lisbon and Fundação de Serralves in Porto, Portugal.

[14] In 1987, the dean of Harvard Graduate School of Design, the Spanish architect Rafael Moneo, organized the first show of Siza's work in the United States.

[15] In 1992, he was awarded with the renowned Pritzker Prize for the renovation project that he coordinated in the Chiado area of Lisbon, a historic commercial sector that was all but completely destroyed by fire in August 1988.

Siza's Iberê Camargo Foundation in Porto Alegre, his first project built in Brazilian territory, was honoured by the Venice Architecture Biennale with the Golden Lion award in 2002.