Verdi's seven-movement Requiem expresses an awesome range of emotions. We focus on its huge, 38-minute Dies irae (Day of Wrath) section and its closing Libera me. Along with Beethoven's Missa solemnis (1822) and Brahms's German Requiem (1869), Verdi's Requiem is the greatest work of religious music written between 1800 and 1900.