Operetta
One of the most popular of all operettas was Die Lustige Witwe (The Merry Widow) by Franz Léhar.  It was produced in 1905 in Vienna.  Léhar wrote many other operettas as well.  Franz von Suppé is another composer who wrote operettas in the Austrian tradition. The most known Romanian operetta is Crai nou (New moon) by Ciprian Porumbescu.