What one-act ballet's music was written by an Austrian composer and conductor?
Anton Webern Anton Friedrich Wilhelm (von) Webern (] ; 3 December 188315 September 1945) was an Austrian composer and conductor. Along with his mentor Arnold Schoenberg and his colleague Alban Berg, Webern was at the core among those within and more peripheral to the circle of the Second Viennese School, including Ernst Krenek and Theodor W. Adorno. As an exponent of atonality and twelve-tone technique, Webern exerted influence on contemporaries Luigi Dallapiccola, Křenek, and even Schoenberg himself. As a tutor, Webern guided and variously influenced Arnold Elston, Frederick Dorian (Friederich Deutsch), Matty Niël, Fré Focke, Karl Amadeus Hartmann, Philipp Herschkowitz, René Leibowitz, Humphrey Searle, Leopold Spinner, and Stefan Wolpe.
Il Parnaso confuso Il Parnaso confuso ("Parnassus in Turmoil") is an opera by the composer Christoph Willibald Gluck. It takes the form of an "azione teatrale" in one act. The Italian-language libretto is by Pietro Metastasio. The opera premiered on 24 January 1765 at Schönbrunn Palace in Vienna. All the members of the cast were archduchesses of the Habsburg family and the work was conducted by the future Emperor Leopold II from the harpsichord.