The Waltz in C-sharp minor is the second work of Chopin's opus 64 and the companion to the Minute Waltz (Op. 64, No. 1). It was composed in 1847. Chopin dedicated this Waltz to Madame Nathaniel de Rothschild.
It consists of three main themes:
The overall layout of the piece is A B C B A B. In an orchestrated version, it forms part of the ballet Les Sylphides.