DOWNLOAD: Frédéric Chopin - Mazurka Op. posth. in A Minor ( from Mazurkas by Chopin). Piano sheet music to print immediately or to view in mobile devices. Frédéric Chopin, who was one of the prominent composers active in the Early Romantic era, wrote this piece titled "Mazurka"Op. posth. in A Minor from Mazurkas. The composition is categorized as "Piece" in the sheet music library and the level of difficulty in the piano music database is 7.