It is said that in a recital given on 23 March 1783 with the celebrated composer Christoph Willibald Gluck most likely in attendance, Mozart improvised variations on the song “Unser dummer Pöbel meint” from Gluck’s Singspiel Die Pilgrime von Mekka.

He later put them to paper and had them printed three years later. It is quite possibly Christoph Willibald GlIn April and May 1789, Mozart, along with Prince Lichnowsky, undertook a journey via Dresden and Leipzig to Berlin, where he presumably pl...