The Waltz No. 7 in C-Sharp Minor is the second work of Frédéric Chopin‘s opus 64 and the companion to the Minute Waltz (Op. 64, No. 1). It was composed in 1847 and have three themes with different speeds. It was dedicated to another queen of the Paris salons – Baroness Charlotte de Rothschild, wife of the famous banker and art patron Nathaniel.