Casa de Serralves
Lordelo do Ouro e Massarelos, Portugal · built 1944
Serralves is a cultural institution located in Porto, Portugal. It includes a contemporary art museum, a park, and a villa, with each one of these being an example of contemporary architecture, Modernism, and Art Deco architecture. The museum, designed by Álvaro Siza Vieira, is now the second most visited museum in Portugal (almost 1 million visitors per year).
Country house data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).