 The Kyrie and Gloria from Bach's B minor Mass were composed in 1733, possibly the former as a lament for the death of Elector Augustus II the Strong (who had died on 1 February 1733) and the latter to celebrate the accession of his successor the Saxon Elector and later King Augustus III of Poland, who converted to Catholicism in order to ascend the throne of Poland.In the hope of obtaining the title "Electoral Saxon Court Composer" Bach presented these to Augustus as a set of parts (Kyrie–Gloria Mass, (early version)).They may have been performed in 1733, not in the presence of its dedicatee, possibly at the Sophienkirche where Bach's son Wilhelm Friedemann Bach had been organist since June.