Fantaisie-Impromptu

Frédéric Chopin's Fantaisie-Impromptu in C♯ minor is a solo piano composition. It is one of his best-known pieces. It was composed in 1834. Chopin did not want the work to be published. Even so, it was published by Julian Fontana.
The structure of the piece is in "A B A Coda" form. Some aspects of this piece are similar to Beethoven's "Moonlight" Sonata. The opening tempo is "allegro agitato". It changes to "largo" for the two bars after the 'A' section. The tempo for most of the 'B' section is "moderato cantabile". Finally, after the 'B' section, it changes to presto. The piece on a C-sharp major rolled chord.