Samuel Barber's Symphony in One Movement (Op. 9) was completed 24 February 1936. It was premiered by Rome's Philharmonic Augusteo Orchestra under the baton of Bernardino Molinari on 13 December 1936. It lasts around 21 minutes. The title given in the printed score of the work is First Symphony (in One Movement),[1] and the uniform title is Symphonies, no. 1, op. 9.