"Dies Irae" is a Latin hymn that translates to "Day of Judgment." It is traditionally associated with the Requiem Mass, a service for the deceased in the Roman Catholic Church. The hymn reflects themes of divine judgment and the end of the world, emphasizing the need for mercy and redemption. Composed in the 13th century, "Dies Irae" has influenced various musical works, including those by Wolfgang Amadeus Mozart and Giuseppe Verdi. Its powerful imagery and solemn tone have made it a significant piece in both religious and classical music, often evoking a sense of awe and reflection on mortality.