Fantaisie-Impromptu

Frédéric Chopin's Fantaisie-Impromptu in C minor, Op. posth. 66, WN 46 is a solo piano composition that was composed in 1834 and published posthumously in 1855. It was never published by Chopin himself, despite its popularity and frequent performances. The piece has been the subject of various interpretations and speculations, including similarities with Ludwig van Beethoven's "Moonlight" Sonata and a possible connection to the Baroness d'Este, who received a commissioned version of the piece in 1835. The Fantaisie-Impromptu features cross-rhythms and a ceaselessly moving note figuration, with changes in tempo and key throughout the piece, ultimately ending in a presto.learn more on wikipedia