Many people have written music for the text . Such as Bruckner , Verdi , Berlioz , DvoÅ Ã k , Haydn , Britten , and Mozart , just naming a few . The text has been set to music by many composers , with settings by Haydn , Mozart , Berlioz , Verdi , Bruckner , DvoÅ Ã k , Britten , and PÃ rt among the better known .