Works by Ludwig van Beethoven
Ludwig van Beethoven's work comprises more than 650 compositions. They are registered as 138 works with an opus number (op.) and 205 pieces without an opus number (WoO). The systematic catalogue raisonné leads to a "work homepage" for each work which features explanations and listening samples as well as important documents related to the pieces and now owned by the Beethoven-Haus: 440 manuscripts from Beethoven (autographs), copies by professional copyists and drafts, 1200 first publications as well as work related letters and pictures. For each document, visitors can read and listen to scientific and interesting information.