Jānis Liepiņš was a conductor for which opretta composed by Johann Strauss II?
Die Fledermaus Die Fledermaus (] , "The Bat", sometimes called "The Revenge of the Bat") is an operetta composed by Johann Strauss II to a German libretto by and Richard Genée.
Karl Michael Ziehrer Karl Michael Ziehrer (also spelled as Carl Michael Ziehrer) (2 May 1843 – 14 November 1922) was an Austrian composer. In his lifetime, he was one of the fiercest rivals of the Strauss family; most notably Johann Strauss II and Eduard Strauss.