What Austro-Hungarian composer helped produce "Princess Flavia" and "New Moon"?
Sigmund Romberg Sigmund Romberg (July 29, 1887 – November 9, 1951) was an Austro-Hungarian composer who spent most of his adult life in the United States. He is best known for his musicals and operettas, particularly "The Student Prince" (1924), "The Desert Song" (1926) and "The New Moon" (1928).
Johann Kaspar Mertz Johann Kaspar Mertz (in Hungarian: "János Gáspár Mertz" ) (17 August 1806 – 14 October 1856) was an Austro-Hungarian guitarist and composer.