The three photogravures by Valentino Barachini represent Il Cairo, Giza and Bogotá. They have been realized by the ancient photomechanical process that transfers the photographic negative on a zinc plate, thus producing an incision in relief whence is printed the photograph. The photogravures were pulled by hand in 20 copies numbered and signed on pure cotton paper Rosaspina Fabriano 12x18 cm.