Richard Georg Strauss, born on 11 June 1864, died on 8 September 1949, was a German composer, conductor, pianist, and violinist. Strauss's compositional output began in 1870 when he was just six years old and lasted until his death nearly eighty years later. While his output of works encompasses nearly every type of classical compositional form, Strauss achieved his greatest success with tone poems and operas. His first tone poem to achieve wide acclaim was Don Juan, and this was followed by other lauded works of this kind, including Death and Transfiguration, Till Eulenspiegel's Merry Pranks, Also sprach Zarathustra, Don Quixote, Ein Heldenleben, Symphonia Domestica, and An Alpine Symphony. His first opera to achieve international fame was Salome which used a libretto by Hedwig Lachmann that was a German translation of the French play Salomé by Oscar Wilde. This was followed by several critically acclaimed operas with librettist Hugo von Hofmannsthal: Elektra, Der Rosenkavalier, Ariadne auf Naxos, Die Frau ohne Schatten, Die ägyptische Helena, and Arabella. His last operas, Daphne, Friedenstag, Die Liebe der Danae and Capriccio used libretti written by Joseph Gregor, the Viennese theatre historian. Other well-known works by Strauss include two symphonies, lieder (especially the Four Last Songs), the Violin Concerto in D minor, the Horn Concerto No. 1, Horn Concerto No. 2, his Oboe Concerto and other instrumental works such as Metamorphosen. A prominent conductor in Western Europe and the Americas, Strauss enjoyed quasi-celebrity status as his compositions became standards of orchestral and operatic repertoire. He was chiefly admired for his interpretations of the works of Liszt, Mozart, and Wagner in addition to his own works. A conducting disciple of Hans von Bülow, Strauss began his conducting career as Bülow's assistant with the Meiningen Court Orchestra in 1883. After Bülow resigned in 1885, Strauss served as that orchestra's primary conductor for five months before being appointed to the conducting staff of the Bavarian State Opera where he worked as third conductor from 1886 to 1889. He then served as principal conductor of the Deutsches Nationaltheater und Staatskapelle Weimar from 1889 to 1894. In 1894 he made his conducting debut at the Bayreuth Festival, conducting Wagner's Tannhäuser with his wife, soprano Pauline de Ahna, singing Elisabeth. He then returned to the Bavarian State Opera, this time as principal conductor, from 1894 to 1898, after which he was principal conductor of the Berlin State Opera from 1898 to 1913. From 1919 to 1924 he was principal conductor of the Vienna State Opera, and in 1920 he co-founded the Salzburg Festival. In addition to these posts, Strauss was a frequent guest conductor in opera houses and with orchestras internationally.