Max Kalbeck was a close friend and partisan of Johannes Brahms. Kalbeck's principal achievement was his eight-volume biography of that composer, published from 1904 to 1914, which has never been translated into English. Kalbeck also edited several volumes of Brahms's correspondence and in 1918, the letters of the poets Gottfried Keller and Paul Heyse, as well as publishing two collections of his own music reviews. Kalbeck wrote new libretti for Mozart's "Bastien und Bastienne" and "La finta giardiniera"; and he revised those of "Don Giovanni" and "The Marriage of Figaro" for Gustav Mahler's productions at the Vienna Hofoper. In addition, he supplied
L'Upupa und der Triumph der Sohnesliebe L'Upupa und der Triumph der Sohnesliebe L'Upupa und der Triumph der Sohnesliebe (English: "The Hoopoe and the Triumph of Filial Love") is an opera by Hans Werner Henze with a German libretto by the composer, inspired by Arab and Persian legends. This is Henze's 15th, and self-stated final, opera, and the first where he has written his own libretto. The opera was first performed at the Salzburg Festival on 12 August 2003 in a co-production with the Deutsche Oper Berlin and the Teatro Real, Madrid, staged by Dieter Dorn, set by Jürgen Rose. For the premiere, the originally scheduled conductor