'Mar�a de Buenos Aires brought me inner peace, a partial serenity that has changed my way of approaching music. I reached the zenith of my musical life at the time. (Astor Piazzolla) Piazzolla himself equated Mar�a to the tango and it's historical ups and downs; and this is probably also the primary aid to understanding the reception of the contents of the piece. Next to that, there is also a musical diction that is entirely unique in the second half of the 20th century, indeed in the New Music scene as a whole. 'I learnt something: to be patient, to be self-critical, to co-ordinate reflection with passion. Now I am told: 'That is a different Piazzolla', but that is not the case. I am the same man, but I have reached a synthesis'. (Astor Piazzolla)