Madrid

It houses one of the largest museums in the world—Prado.

An excerpt from the article 17 facts about Madrid
It was established in 1819 by order of King Ferdinand VII of Spain, who thus fulfilled the wish of his second wife, Maria Izabela Braganza. The Prado has around 8,200 drawings, 7,600 paintings, 1,000 sculptures, and many other valuable works of art and historical exhibits. The main building houses a permanent exhibition with 1,300 exhibits. Prado's collection includes paintings by Francisco Goya, El Greco, Pablo Picasso, Titian, Tintoretto and Hans Memling.