One of the most prolific composers to emerge from Brazil, José Antônio Rezende de Almeida Prado began as a cultivator of nationalism, studying with Camargo Guarnieri, but as a pupil of Boulanger and Messiaen in Paris was compelled to look for other means of self-expression, attaining a level of aesthetic freedom which encompassed atonalism, post-serialism, extended and free tonalism. Among his most important achievements, referred to by him as an “incredible adventure”, are his 18 Cartas Celestes (Celestial Charts), a set of works depicting the sky and constellations, in which he adopted a new harmonic language called “transtonality”. Of the 18 Cartas Celestes, 15 are written for solo piano, while the remaining three are scored two pianos and symphonic band (No. 7), for violin and orchestra (No. 8) and for piano, marimba and vibraphone (No. 11).