Cabildo is the only opera by the American composer Amy Beach, her opus 149. This chamber opera is in one act and has a libretto by . Beach composed the music in 1932 and made use of folksong and Creole tunes. However, the work was not performed in her lifetime and received its first performance in 1947. Subsequent performances were in 1981, at the University of Missouri-Kansas City, and in 1982, at the American Musicological Society meeting and the Sonneck Society. The first fully professional production was on May 13, 1995, as part of the "Great Performers at Lincoln Center" series, led by Ransom Wilson and directed by Hans Nieuwenhuis.