orologio en CB01 OFFICIAL. An operetta with music by Johann Strauss II. However, he did not see the premiere. Wiener Blut is set at the time of the Congress of Vienna, 1814-1815, an international conference that sought to settle Europe after the upheavals of the Napoleonic Wars, and follows a traditional operetta plot full of mistaken identities. Count Balduin Zedlau, ambassador of the tiny court of Reuss-Schleiz-Greiz, is posted to Vienna. Count Zedlau is married but a real Don Juan always looking for a new encounter. Many of Strauss' compositions are used in the operetta although he did not specifically composed them for the operetta.