Köchel catalogue son's earlier works; Mozart's catalogue of his own compositions (begun in February 1784 with K. 449) allows relatively precise dating of many of his later works. The catalogue included the opening bars of each piece, known as an incipit. Köchel divided the corpus into a main chronology of 626 works, and five appendices ("" in German, abbreviated to "Anh.") The appendices (Anh. I-V) included: Since Köchel published his original catalogue in 1863 (now referred to as K), the dating of Mozart's compositions has been subject to constant revision. Many more pieces have since been found, re-dated, re-attributed and re-numbered, requiring
John Field (composer) were influenced by these works, which are particularly notable for their central movements, frequently nocturne-like. Some of the less known works were also historically important: particularly the piano fantasies, in which Field pioneered the Romantic large scale episodic structure. None of his piano sonatas, and only two of his 7 piano concertos, have a formal slow movement. In performance, Field would interpolate an existing nocturne in a related key or improvise one. This list is arranged according to Hopkinson numbers, introduced in the 1961 catalogue by Cecil Hopkinson. Many of these works were arranged for other instruments and (or) revised