레퀴엠 (Mass) is a musical composition that honors the deceased, often performed in a religious context. It typically includes various sections such as the Kyrie, Gloria, and Agnus Dei, which are part of the traditional Roman Catholic Mass. The music can vary in style, ranging from choral works to orchestral arrangements. Composers like Wolfgang Amadeus Mozart and Giuseppe Verdi are well-known for their famous requiem masses. These compositions not only serve a liturgical purpose but also express deep emotions, reflecting themes of loss, mourning, and hope for eternal rest.