This new publication offers a source-critical edition of Mozart’s fragmentary “Requiem” (Bärenreiter-Verlag) as well as an alternative to the traditional Süßmayr version. When completing the fragment, the editor Michael Ostrzyga (photo: Christian Palm) drew on comprehensive comparative and analytical studies of Mozart’s church style and compositional workmanship. The influence of Handel and Bach manifested in his final years, particularly in the “Requiem” fragment, is taken into account in those sections requiring completion or fresh composition. At two points readers may choose between alternative movements (or sections), since proceeding from Süßmayr’s historical version, two divergent options cannot be weighed against each other but each one may well reflect Mozart’s intentions. The new completion offers choirs and orchestras the opportunity to perform this legendary work in a well thought through version based on the most up-to-date research.