Frédéric Chopin’s Fantasie Impromptu in C-sharp minor, Op. 66, is one of his most popular and virtuosic piano compositions. Composed in 1834 but published posthumously in 1855, the piece is characterized by its contrasting sections, blending lyrical, expressive melodies with rapid, intricate passagework.
The work is divided into three parts: a lively, staccato opening theme, a contrasting lyrical middle section in D-flat major, and a return to the original lively theme. Known for its technical demands, particularly in the fast, fluid right-hand runs, Fantasie Impromptu showcases Chopin’s ability to merge emotion with virtuosity, making it a favorite among pianists and audiences alike.