Strauss, Johann composer of waltzes and other dances and of operettas, is often called the Walzerkönig, king of waltzes. Among his best-known works are the waltzes ‘An der schönen blauen Donau’ (adapting a poem by K. J. Beck), ‘G'schichten aus dem Wiener Wald’, ‘Wiener Blut’, and ‘Rosen aus dem Süden’, and the ‘Tritsch-Tratsch-Polka’.Encouraged by Offenbach's successes in Paris, Strauß composed a number of operettas, including Die Fledermaus (1874, libretto by C. Haffner and R. Genée), Cagliostro in Wien (1875, libretto by G. Quedenfeld), Eine Nacht in Venedig (1883, libretto by F. Zell and R. Genée), Der Zigeunerbaron (1885, libretto by J. Schnitzer), and Wiener Blut (1899, libretto by V. Léon and L. Stein).Strauß is often referred to as Johann II, since his father (Johann I, 1804-49), brothers (Joseph 1827-70, and Eduard, 1835-1916), and nephew (Eduard's son, Johann III, 1866-1939) were all composers of waltzes.