Britten’s largest choral work is the War Requiem (1962) for choir and orchestra, based on the Latin requiem mass text and the poems of Wilfred Owen, who was killed in World War I. Other choral works include the Hymn to St. Cecilia (1942; text by Auden), Ceremony of Carols (1942), Rejoice in the Lamb (1943), St. Nicolas (1948), Spring Symphony (1949), and Voices for Today (1965; written for the United Nations’ 20th anniversary).