The seductive sound and renewed interest in the Tango has brought the music of Argentinian composer Astor Piazzolla into the world of the popular classics. His large catalogue of works is unique in using the Tango as the basis for all of his compositions, though he developed the art to the point where it is at times difficult to detect the dance in his complex and strictly classical music. Of his many works for chamber groups, the Histoire du Tango, scored for flute and guitar, is one of his most popular and frequently performed. In tracing the history of the Tango, Piazzolla popular dance rose from shady beginnings to the respectability of the concert hall.