In 1914, Louis Hirsch, house composer for the Schubert Brothers, resigned his post. The Schuberts then hired Sigmund Romberg to be his replacement. In 1914 he scored his first Broadway musical, "The Whirl of the World." It was staged at the Wintergarden Theater, and starred the Dolly Sisters, and Willie and Eugene Howard. The success of the show insured Romberg's future on the Broadway stage. That was 1914. By 1917, Romberg had already written more than 300 songs for over 17 musicals. Among these shows were several Al Jolson musicals at the Wintergarden; several editions of "The Passing Show," and, in 1915, "The Blue Paradise" operetta. For the Blue Paradise, he wrote his first big hit, "Auf Wiedersehen", with lyric by Herbert Reynolds.