"The Blue Danube" is the common English title of "An der schönen blauen Donau", Op. 314 / German for "By the Beautiful Blue Danube", a waltz by the Austrian composer Johann Strauss II (1825-1899), composed in 1866.
Originally performed on 15 February 1867 at a concert of the Wiener Männergesang-Verein (Vienna Men's Choral Association), it has been one of the most consistently popular pieces of music in the classical repertoire.
Its initial performance was considered only a mild success, however, and Strauss is reputed to have said:
"The devil take the waltz, my only regret is for the coda - I wish that had been a success!"
Mihály Zichy | Ball in the Concert Hall of the Winter Palace during the Official Visit of Nasir al-Din Shah in May 1873-1874 | State Hermitage, St. Petersburg