This publication offers a source-critical edition of Mozart’s fragmentary “Requiem” as well as an alternative to the traditional Süßmayr version. It makes it possible to perform 1) the fragment, identified in print in both the score and the parts, 2) the authentic sections left incomplete by Mozart, now in a stylistically appropriate orchestration, and 3) those sections missing entirely in the fragment, newly added in Mozart’s idiom taking into account historical additions by Süßmayr and Eybler....