' is an operetta by Leo Fall. The German libretto was by Alfred Maria Willner and Fritz Grünbaum after the comedy by Emerich von Gatti and Thilo Friedrich Wilhelm von Trotha.
It was first performed at the Theater an der Wien in Vienna on 2 November 1907, conducted by the composer and starring Mizzi Günther as Alice. An English adaptation, called The Dollar Princess opened in London at Daly's Theatre on 25 September 1909 and ran for 428 performances.
A piano score with German lyrics (but no vocal parts) is kept in Special Collections at the University of Leeds. It was digitised as part of a research project in 2018.