The Latin word refers to "rest", particularly in the
context of the words used in the musical setting of the mass, "Give them eternal rest, O Lord". It has come to include any musical expression of comfort for the dead. The joyful parts of the mass are typically not included (Gloria, Credo, Alleluia).
Gradually, composers expanded requiems to include philosophies of death and life, e.g. Brahms's inclusion of passages from Ecclesiastes. The long list of requiems written by composers
Includes Ockeghem, Palestrina, Victoria, Cherubini, Mozart, Berlioz, Dvořák, Bruckner, Verdi, Saint-Saëns, Fauré, Britten and