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The catalogue contains over 1,000 composers, 8,000 works and 15,000 music editions or books on music. The name "Härtel" was added when Gottfried Christoph Härtel took over the company in 1795. In 1807, Härtel began to manufacture pianos, an endeavour which lasted until 1870. Breitkopf pianos were highly esteemed in the 19th century by such pianists as Franz Liszt and Clara Schumann.
In the 19th century the company was for many years the publisher of the Allgemeine musikalische Zeitung, an influential music journal.[2]
Archival materials of the publishing house form the fonds 21081 Breitkopf & Härtel in the State Archives in Leipzig (part of the Saxon State Archives, in German Sächsisches Staatsarchiv).[4]
^see Thekla Kluttig: Nur Briefe berühmter Komponisten? Archivgut von Leipziger Musikverlagen als Quelle für die Musikwissenschaften, in Die Musikforschung 66 (2013), Heft 4, p. 391-407.
