Designed in 1964 by Pedro Ramírez Vázquez, Jorge Campuzano, and Rafael Mijares Alcérreca, the monumental building contains exhibition halls surrounding a courtyard with a huge pond and a vast square concrete umbrella supported by a single slender pillar (known as "el paraguas", Spanish for "the umbrella"). The halls are ringed by gardens, many of which contain outdoor exhibits. The museum has 23 rooms for exhibits and covers an area of 79,700 square meters (almost 8 hectares) or 857,890 square feet (almost 20 acres).

Source: Wikipedia