Anton Webern's Concerto for Nine Instruments, Op. 24 (German: Konzert für neun Instrumente) is a twelve-tone chamber piece composed in 1934. Its tone row is one of the most notable in history. The piece is admired for its extreme concision and is considered a hallmark in the development of total serialism.

By the late 1920s, Webern had developed an extraordinary application of Arnold Schoenberg's twelve-tone technique in works like String Trio (1927), Symphony (1928), and Quartet (1932).^[1]