Requiem K.626 The Requiem, completed by Franz Xaver Süssmayr, in its traditional form. Mozart’s final work, the Requiem K.626, was left incomplete and it is fraughtwith questions and emotions: the expressive depth of its music, sorrow at the great composer’s early death, truth and legend, fragments and attempts to complete the work. The completion of the fragmentary score by hisassistant Franz Xaver Süssmayr, who helped him with The Magic Flute, has the character of a historical source with utmost closeness to Mozart’s thoughts. - Urtext of the NewMozartEdition