H. Koch: The six-year-old Mozart at Schönbrunn being presented to the imperial couple by Archduke Josef, xylograph after a painting by Eduard Ender

H. Koch: The six-year-old Mozart at Schönbrunn being presented to the imperial couple by Archduke Josef, xylograph after a painting by Eduard Ender

On 13 October 1762 the ten-year-old Maria Anna and the six-year-old Wolfgang Mozart performed on the violin and...