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.
Hans Sitt Jan Hanuš Sitt, known as Hans Sitt, (21 September 1850, Prague – 10 March 1922, Leipzig), was a Bohemian violinist, violist, teacher, and composer. During his lifetime, he was regarded as one of the foremost teachers of violin. Most of the orchestras and conservatories of Europe and North America then sported personnel who numbered among his students.