Koussevitzky asked many famous composers to write music for the orchestra. Works written especially for them include "Symphony No. 4" by Sergei Prokofiev and the "Symphony of Psalms" by Igor Stravinsky. They also gave the first performance of Béla Bartók's "Concerto for Orchestra". Since then many other composers have written for the orchestra including Roger Sessions, Andrzej Panufnik and Elliott Carter.