from Wikipedia:
Rudolf Dellinger (* July 8, 1857 in Graslitz, western Bohemia; † September 24, 1910 in Dresden) was a composer and kapellmeister. The son of a woodwind instrument maker, he received instruction at the music school in Graslitz from 1865 to 1874. From 1874 to 1879 he studied at the Prague Conservatory. Here he received lessons in piano from Julius Pisarowitz, among others, and worked as a conservator at the orchestra of the ''German Theater'' in Prague. After completing his musical education, he took up a position as a clarinetist in Brno in 1880 and was subsequently a kapellmeister at the theater in Brno. In the following years he worked as a Kapellmeister in Passau, Saaz, Eger, Pilsen, Warnsdorf, Czernowitz, Karlsbad, Prague and Salzburg. In 1883 he went to Hamburg, where he worked at the ''Carl Schultze Theater''. Here he wrote his first operetta, ''Don Cesar'' which also had its premiere and 1500 performances in Hamburg. In 1893 Rudolf Dellinger was appointed Kapellmeister at the ''Residenztheater'' in Dresden, where he worked until his death. He died in 1910 in the sanatorium and nursing home in Dresden and was buried in the ''Johannis Cemetery.''
Rudolf Dellinger composed almost exclusively operettas and was considered one of the outstanding composers of this genre of his time.

Note: Tranlated from the German version of Wikipedia into English