16, sometimes called Introduction and Rondo, is a classical composition by Frédéric Chopin, written in 1833.
[1] It was dedicated to his pupil Caroline Hartmann [de].
It begins with a passionate introduction in C minor, followed by the joyful main theme in E-flat major.
To conclude, the main theme returns, followed by the coda.
The piece as a whole is varied and interesting, but challenging for the pianist.