After the destruction of the old Leipzig Opera House (which confusingly enough was known as the New Theater), the Haus Dreilinden had to serve as the main opera venue from 1944 to 1960, when the present opera house on Karl-Marx-Platz (now Augustusplatz) was opened.
When I was there they were advertising one of my favorite light operas, Martha by Friedrich von Flotow, which I have seen in Darmstadt and Detmold but not yet in Leipzig.
The address is Dreilindenstraße 30. Take the tram number 3, 7, 8, 13 or 15 and get off at "Straßenbahnhof Angerbrücke".
Update: For most of the year 2007, until November 11, Dreilinden is again serving as a substitute opera venue while the main opera house is being modernized and repaired.


