I didn’t know about Alexander Calder till I saw his exhibition at Musée Picasso in Paris, his art works were displayed together with Picasso’s works. Alexander Calder is known for inventing wire sculptures and the mobile, a type of kinetic art which relied on careful weighting to achieve balance and suspension in the air. He didn't limit his art to sculptures; he also created paintings, jewelry, theatre sets and costumes.An important Alexander Calder work is the monumental "Floating Clouds" (1952-1953) of the Aula Magna (Central University of Venezuela) of the University City of Caracas in Venezuela. This work is a Unesco World Heritage Site. Calder's clouds were specially designed to combine art and technology, making the auditorium one of the top 5 university auditoriums in the world by sound quality.