Rudy Giovannini & Strato Vani “Blaue Donau” par dm_50c4f8fca4a08 Johann Strauss classic Blue Danube celebrates anniversary in Vienna It’s a little anniversary that went by practically unnoticed. Johann Strauss Junior’s “Blue Danube” is 150 years old since February 15, 2017, as it had its first performance in 1867. The melody is perhaps the best-known waltz…