A recently discovered aria by Johann Sebastian Bach (1685–1750) is to receive its first-ever modern performance in Weimar at the beginning of September, organisers of the city's Kunstfest said yesterday. German soprano Juliane Banse will perform the hitherto unkown work, discovered this year in the archives of the famous Anna-Amalia Library in Weimar, on September 3 in the ceremonial ballroom of Weimar's Residenzschloss palace. Banse will be accompanied by Hungarian pianist András Schiff on harpsichord and the French-Austrian string quartet, Quatuor Mosaïques. The two-page handwritten aria, entitled "Alles mit Gott und nichts ohn' ihn" ("Everything with God and nothing without...