The Vienna Opera Ball Orchestra performed for the 26th time in the third largest amphitheatre in the world. The building, erected in 238 AD, has been one of the venues for the Tunisian Summer of Culture for decades. The WOO, under the direction of Christoph Huber, delighted the more than 5000 visitors with Viennese sounds. The two vocal soloists Andreja Zidaric from the Staatstheater am Gärtnerplatz in Munich and Günter Haumer from the Vienna Volksoper interpreted the popular melodies from Franz Lehar to Emmerich Kálmán with great voices and a lot of feeling. Once again, the WOO was given a standing ovation shortly after midnight after the Danube Waltz and the Radetzky March.