Opus number developed other catalogue-number systems; among them the "Bach-Werke-Verzeichnis" (BWV-number), and the "Köchel-Verzeichnis" (K- and KV -numbers) with which are organised the works of Johann Sebastian Bach and Wolfgang Amadeus Mozart, respectively. In the classical period, the Latin word "opus" ("work", "labour") was used to identify, list, and catalogue a work of art. By the 15th and 16th centuries, the word "opus" was used by Italian composers to denote a specific musical composition, and by German composers for collections of music. In compositional practise, numbering musical works in chronological order dates from 17th century Italy, especially Venice. In common usage, the
Kochel is documented at the Franz Marc museum in Kochel. He is buried in the village cemetery. Kochel Kochel am See is a municipality in the district of Bad Tölz-Wolfratshausen in Bavaria on the shores of Kochelsee. The municipality consists of the districts Altjoch, Brunnenbach, Ort, Pessenbach, Pfisterberg, Walchensee and Ried. Apart from its scenery, the settlement is known for the Smith of Kochel "Schmied von Kochel", who, according to legend, lead a Bavarian farmer rebellion against Austro-Hungarian occupiers at Sendling in the War of the Spanish Succession. Kochel is also known for its hydroelectric dam. It is a popular place