Augustus III of Poland
Bach conducted the Sanctus, in its first version, at the 1724 Christmas service in Leipzig, and re-used it in Christmas services in the mid-1740s. Scholars differ on whether he ever performed the 1733 Missa. Arnold Schering (in 1936) asserted that it was performed in Leipzig on April 26, 1733, when Augustus III of Poland visited the town, but modern scholars reject his argument for several reasons: