Mozart's was uncompleted at his death, and Brahms set verses of the German Bible to music in his version.
Gabriel Faure's version ditched all parts that called for drums and bass, while Berlioz's called for four brass choirs among other things.  Hindemith wrote one for President Roosevelt based on Walt Whitman's "When Lilacs Last in the Dooryard Bloom'd," and Benjamin Britten's version contains nine poems by Wilfred Owen interspersed with the original text.  Mozart's was uncompleted at his death, and Brahms set verses of the German Bible to music in his version. The Dies Irae [DEE-es EYE-ray] is now optional in, FTP, what type of choral work that is a proper Mass for the souls of the dead?
Gabriel Faure's version ditched all parts that called for drums and bass, while Berlioz's called for four brass choirs among other things.  
requiem