The International Exhibition of PAR of 1937 was the pre-lico stage in which the public could witness the confrontation of the pavilions of the USSR of Stalin and Hitler's Germany, contemplate the reorganization of the entire Trocadéro space or be moved by the cry for help of the pavilion of the Spanish Republic ola of SERT and Lacasa. ESTE book published in facsimile edition, in Spanish, for the first time, is where Le Corbusier condensed the experience of this exhibition.