Wiener Blut (Viennese Blood) is an 1899 operetta named after Johann Strauss II's eponymous 1873 waltz. It was made with Strauss' approval, but without his participation. Its score reuses music he wrote for other works along with some music by his brother Josef Strauss;[1] the job of compilation went to Adolf Müller. Its libretto is by Victor Léon and Leo Stein. The setting is the Congress of Vienna. Strauss may have seen a draft of the work, but he died a few months before its 26 October premiere at Vienna's Carltheater.