Twelve Variations on "Ah vous dirai-je, Maman"
It was once thought that this piece was composed in 1778 when Mozart was briefly living in Paris. It was assumed that he could only have picked up a French folk song while living in France. Based on this assumption, the piece was re-numbered from K. 265 to K. 300e in the chronological catalogue of Mozart's compositions.  Later analysis of Mozart's manuscript indicated 1781/1782 as the probable composition date.