The construction of this urban project started by Eusebi Güell began in 1900. Although the gatehouse pavilions and the monumental staircase (1902-1906) also contain spectacular pieces of ceramic trencadís, it is on the roofs of the Hypostyle Hall that Josep M. Jujol created an unusual world with recycled materials. The central elements are four suns representing the seasons, accompanied by smaller moons.