Die Csárdásfürstin (The Csárdás Princess; translated into English as The Riviera Girl and The Gipsy Princess, traditionally called "Silva" in Russia) is an operetta in 3 acts by Hungarian composer Emmerich Kalman with libretto by Leo Stein and Bela Jenbach. It premiered in Vienna at the Johann Strauss Theater on November 17, 1915. Many versions of films and recordings have been filmed. The operetta is popular in Europe, especially in Hungary, Austria, Germany and the former Soviet Union, where it was filmed in a popular film. This is perhaps Kalman's most successful work.