Piano sheet music and recordings. This piece is from Mazurkas by Frédéric Chopin: Mazurka Op. 7 No. 1 in B-flat Major . Level 6, Period: Early Romantic Mazurka Op. 7 No. 1 in B-flat Major, by the early romantic composer Frédéric Chopin. It was written during the Early Romantic period and is included in Mazurkas by Chopin.