Astor Piazzolla's name has become synonymous with tango, the signature dance of his native country, Argentina. In the Sinfonia Buenos Aires, Piazzolla's development of symphonic tango is notable for brilliant, original and often complex orchestration. His Bandoneon Concerto, nicknamed 'Aconcagua' after the highest Andean mountain, provides the soloist with ample opportunities for drama, pathos and virtuosity. Las Cuatro Estaciones Portenas (The Four Seasons of Buenos Aires), a series of single tango movements with several references to Vivaldi's famous work, is a vivid sequence in which the changing moods of the seasons are expressed by means of an almost limitless emotional range and depth.