The youngest child and only surviving son of Leopold Mozart, Wolfgang Amadeus was born in Salzburg in 1756, the year of publication of his father's treatise on violin-playing. He showed early precocity both as a keyboard-player and violinist, and soon turned his hand to composition. His obvious gifts were developed under his father's tutelage, with those of his elder sister, and the family, through the indulgence of their then patron, the Archbishop of Salzburg, was able to travel abroad, between 1763 and 1766, to Paris and to London. A series of other journeys followed, with important operatic commissions in Italy between 1771 and 1773. The following period proved disappointing to both father and son, as the young Mozart grew to manhood, irked by the lack of opportunity and lack of appreciation of his gifts in Salzburg, where a new Archbishop proved less sympathetic. A visit to Munich, Mannheim and Paris in 1777 and 1778 brought no substantial offer of other employment and by early 1779 Mozart was reinstated in Salzburg, now as court organist. Early in 1781 he had a commissioned opera, Idomeneo, staged in Munich for the Elector of Bavaria, and dissatisfaction after being summoned to attend his patron the Archbishopin Vienna led to his dismissal. Mozart spent the last ten years of his life in precarious independence in Vienna, his material situation not improved by a marriage imprudent for one in his circumstances. Initial success with German and then Italian opera and series of subscription concerts were followed by financial difficulties. In 1791 things seemed to have taken a turn for the better, in spite of the lack of interest of the successor to the Emperor Joseph II, who had died in 1790. In late November, however, Mozart became seriously ill and died in the small hours of 5 December. Mozart's compositions were catalogued in the 19th century by Köchel, and they are generally now distinguished by K. numbering from this catalogue. Mozart's sonatas for the fortepiano cover a period from 1766 to 1791, with a significant number of mature sonatas written during the years in Vienna. The sonatas include much fine music. In addition to his sonatas he wrote a number of sets of variations, while his ephemeral improvisations in similar form are inevitably lost to us. The published works include operatic variations as well as a set of variations on the theme Ah, vous dirai-je, ma man, known in English as 'Twinkle, Twinkle, Little Star'. An outstanding virtuoso pianist himself, and bearing in mind that his sonatas and variations pose substantial technical challenges-not least in order to ensure that they sound completely effortless and perfectly poised-Mozart played so that the notes 'simply fell as if they were raindrops, scattering like pearls on velvet', in Carl Czerny's memorable words. Like those precious jewels, Mozart's piano music shimmers, glows and rarely fails to delight with it's subtle, sophisticated magic.