Editing Ludwig Ritter von Köchel (section)

==Köchel catalogue==
{{Main|Köchel catalogue}}
In 1862 he published the [[Köchel catalogue]], a chronological and thematic register of the works of Mozart. This catalogue was the first on such a scale and with such a level of scholarship behind it; it has since undergone revisions. Mozart's works are often referred to by their KV-numbers (''cf.'' [[opus number]]); for example, the "Jupiter" symphony, ''[[Symphony No. 41 (Mozart)|Symphony No. 41]]'', KV. 551.  At the same time that Köchel was writing his catalogue [[Otto Jahn]] was making a comprehensive collection of Mozart works and writing a scholarly biography of Mozart.<ref>[[Otto Jahn]], ''Life of Mozart– tr P. D. Townsend Cooper Square Publishers Inc'' {{ISBN|9781108064859}}</ref> When Jahn learned of Köchel's work he turned over his collection to him. Köchel dedicated his catalogue to Jahn.<ref>[[Robert Levin (musicologist)|Robert Levin]], ''Who Wrote the Mozart Four-Wind Concertante pp15-16'' {{ISBN|0-918728-33-9}}</ref>