The Rondo in C minor, Op. 1, was Chopin's first published work (at age 15), and was dedicated to "Madame de Linde", a family friend with whom Chopin played duets. The Rondo à la mazur in F major, Op. 5, was written in 1826, when he was 16. It is the only one of the rondos not written in 2/4 time. The third Rondo, in E-flat major, Op. 16, is sometimes called Introduction and Rondo. This volume is "from the first, critically revised, complete edition."