Waltz in A minor, B.150

Frédéric Chopin's Waltz in A minor, Op. posth., B. 150, WN 63, KK IVb/11, P. 2/11, is a waltz for solo piano. The waltz was published in 1860, after the composer's death, by Jacques Maho. At this time, it was attributed to Charlotte de Rothschild and was published as no. 3 of "Four pieces for piano". This collection also included Chopin's Nocturne in C minor, B. 108. In The Musical Quarterly, January 1939, Jacques-Gabriel Prod'homme first reported the waltz. In 1955, this piece was published in the special edition of the magazine La Revue Musicale and finally reattributed to Chopin. In 1965, it was republished by Andrzej Koszewski.