3(PWM). Chopin wrote works for piano and orchestra between 1827 and 1832. They were written successively therefore there are traces of the gradual crystallisation and maturation of the composer's style. Their form and nature are dominated by the rules of the stile brillant, as well as the tendency to accent the national aspect. Critical source-edition edited by Jan Ekier and Pawel Kaminski based on manuscripts, copies approved by Chopin himself, and first editions. Its purpose is to present the works of Chopin in authentic form.