The first stone of the building was laid in 1863 and the work was finished in 1871 and it was inaugurated in 1877. The building has several entrances and the main one goes to the Auditorium. There are marble staircases and also some Arabic and Byzantine motifs which establishes a contrast with the Neoromanesque architecture for the construction. It has a medieval look and a bit influenced by the French rationalism. The gardens at the back of the building were done in 1934 by Artur Rigol.