In the Hall of the Mountain King (Norwegian: I Dovregubbens hall) is a piece of orchestral music, Opus 23, compose by Edvard Grieg for Henrik Ibsen's play Peer Gynt, which premiered in Oslo on February 24, 1876. (It was later extracted as the final piece of Peer Gynt, Suite No. 1, Op. 46.) Although a performance of the full piece runs to only two and a half minutes, it has attained iconic status in popular culture and is easily recognized, though not, perhaps, by name.