Which jazz-influenced orchestral piece did Walter Johannes Damrosch conduct the world premiere performances of?
Walter Damrosch: Walter Johannes Damrosch (January 30, 1862 – December 22, 1950) was a German-born American conductor and composer. Walter Damrosch:  He is best remembered today as long-time director of the New York Symphony Orchestra and for conducting the world premiere performances of George Gershwin's "Piano Concerto in F" (1925) and "An American in Paris" (1928). An American in Paris: An American in Paris is a jazz-influenced orchestral piece by the American composer George Gershwin, written in 1928.
An American in Paris