Emmerich Kálmán was a Hungarian composer of operettas and a prominent figure in the development of Viennese operetta in the 20th century. Among his most popular works are Die Csárdásfürstin and Gräfin Mariza. Influences on his compositional style include Hungarian folk music, the Viennese style of precursors such as Johann Strauss II and Franz Lehár, and, in his later works, American jazz. As a result of the Anschluss, Kálmán and his family fled to Paris and then to the United States. He eventually returned to Europe in 1949 and died in Paris in 1953.