The Requiem by the Hungarian composer György Ligeti is a large-scale choral and orchestral composition, composed between 1963 and 1965. The work lasts for just under half an hour, and is in four movements: Introitus, a gradual unbroken plane of sound moving from "mourning into the promise of eternal light"; Kyrie, a complex polyphonic movement reaching a fortissimo climax; Dies Irae, which uses vocal and orchestral extremes in theatrical gestures; and the closing Lacrimosa, for soloists and orchestra only, which returns to the subdued atmosphere of the opening.