English Summary: With the death of Johann Strauss in 1899, the golden operetta era came to an end. A military band leader from Transdanubia was then left to renew the genre. Franz Lehar actually wanted to be an opera composer - and achieved world fame with his operettas. For his 150th birthday in 2020, the editors Heide Stockinger and Kai-Uwe Garrels, as well as other authors closely familiar with Franz Lehar, cover a wide range in their contributions...