section_path: Works, musical style, and innovations/Köchel catalogue
section_name: Köchel catalogue
paragraph_text: Köchel catalogue
  
  For unambiguous identification of works by Mozart, a Köchel catalogue number is used. This is a unique number assigned, in regular chronological order, to every one of his known works. A work is referenced by the abbreviation "K." or "KV" followed by this number. The first edition of the catalogue was completed in 1862 by Ludwig von Köchel. It has since been repeatedly updated, as scholarly research improves knowledge of the dates and authenticity of individual works.