In the summer of 1763, Leopold Mozart left with his family on a major journey through western Europe, one which lead them to Germany - where Wolfgang performed for the first time in Augsburg, his father's home town - , France, England and Holland.

During their stay in Paris, Wolfgang's first compositions appeared in print: the Sonatas for Piano and Violin K. 6 and 7 for Madame Victoire de France (as op. I) as well as K. 8 and 9 for Comtesse Adrienne-Catherine de Tessé, née de Noailles (as op. II). The boy's performances were greeted with astonishment and admiration by one and all.