The Rondo in C minor, Op. 1, for solo piano is Chopin's first published work, published in 1825, and dedicated to "Madame de Linde", the wife of the headmaster of the Lyceum at which Chopin was studying. The piece contains an "unorthodox tonal scheme". The first phase begins in C minor, moving into E major, A♭ major, then back to C minor. The second phase moves to D♭ major, finishing in C minor for a final statement of the theme.
The above text from the Wikipedia article "Rondo Op. 1 (Chopin)" text is available under CC BY-SA 3.0.