Famous Spanish architectures include Sagrada Familia in Barcelona, an iconic church designed by Antoni Gaudi that remains unfinished, with 10 towers yet to be completed to realize his design. Plaza de Espana in Seville is a large semi-circular plaza built for the 1929 Ibero-American Exposition. Park Güell in Barcelona is a garden complex covering 17 hectares designed by Gaudi with fantastically shaped rooftops. In Tarragona, Roman ruins include a large circus and vaulted galleries, while Carthagena's well-preserved Roman theater could seat 6,000 people. Famous Spanish artists span several centuries like El Greco, Velazquez, Goya,