Minute Waltz

Minute Waltz

Probably the most popular and well-known
of all piano waltzes by Frederic Chopin.

Technically known as Waltz in D-flat major Op 64 No 1.
Some interesting paraphrases. 

Wiki link here.

Black Key Etude (Chopin/Godowsky)

THE ORIGINAL

Background. The Black Key Etude or Etude Op. 10 No. 5 is an effervescent concert piece for piano by Frederic Chopin, the fifth in his first series of Etudes published in 1833. Etude is the French word for study, and each of the Chopin Etudes focuses on developing a specific skill on the keyboard.