Born in Salzburg, 27 January 1756, son of Leopold Mozart, showed musical gifts at a very early age, composing when he was five and when he was six playing before the Bavarian elector and the Austrian empress. Leopold felt that it was proper, and might also be profitable, to exhibit his children's God-given genius (Maria Anna, 'Nannerl', 1751-1829, was a gifted keyboard player): so in mid-1763 the family set out on a tour that took them to Paris and London, visiting numerous courts en route. Mozart astonished his audiences with his precocious skills; he played to the French and English royal families, had his first music published and wrote his earliest symphonies. The family arrived home late in 1766; nine months later they were off again, to Vienna, where hopes of having an opera by Mozart performed were frustrated by intrigues.
They spent 1769 in Salzburg; 1770-73 saw three visits to Italy, where Mozart wrote two operas (Mitridate, Lucio Silla) and a serenata for performance in Milan, and acquainted himself with Italian styles. Summer 1773 saw a further visit to Vienna, probably in the hope of securing a post; there Mozart wrote a set of string quartets and, on his return, wrote a group of symphonies including his two earliest, nos.25 in g Minor and 29 in A, in the regular repertory. Apart from a joumey to Munich for the premiere of his opera La finta giardiniera early in 1775, the period from 1774 to mid-1777 was spent in Salzburg, where Mozart worked as Konzertmeister at the Prince- Archbishop's court; his works of these years include masses, symphonies, all his violin concertos, six piano sonatas, several serenades and divertimentos and his first great piano concerto, K271.
In 1777 the Mozarts, seeing limited opportunity in Salzburg for a composer so hugely gifted, resolved to seek a post elsewhere for Wolfgang. He was sent, with his mother, to Munich and to Mannheim, but was offered no position (though he stayed over four months at Mannheim, composing for piano and flute and falling in love with Aloysia Weber). His father then dispatched him to Paris: there he had minor successes, notably with his Paris Symphony, no.31, deftly designed for the local taste. But prospects there were poor and Leopold ordered him home, where a superior post had been arranged at the court. He returned slowly and alone; his mother had died in Paris. The years 1779-80 were spent in Salzburg, playing in the cathedral and at court, composing sacred works, symphonies, concertos, serenades and dramatic music. But opera remained at the centre of his ambitions, and an opportunity came with a commission for a serious opera for Munich. He went there to compose it late in 1780; his correspondence with Leopold (through whom he communicated with the librettist, in Salzburg) is richly informative about his approach to musical drama. The work, Idomeneo, was a success. In it Mozart depicted serious, heroic emotion with a richness unparalleled elsewhere in his works, with vivid orchestral writing and an abundance of profoundly expressive orchestral recitative.
Mozart was then summoned from Munich to Vienna, where the Salzburg court was in residence on the accession of a new emperor. Fresh from his success, he found himself placed between the valets and the cooks; his resentment towards his employer, exacerbated by the Prince-Archbishop's refusal to let him perform at events the emperor was attending, soon led to conflict, and in May 1781 he resigned, or was kicked out of, his job. He wanted a post at the Imperial court in Vienna, but was content to do freelance work in a city that apparently offered golden opportunities. He made his living over the ensuing years by teaching, by publishing his music, by playing at patrons' houses or in public, by composing to commission (particularly operas); in 1787 he obtained a minor court post as Kammermusicus, which gave him a reasonable salary and required nothing beyond the writing of dance music for court balls. He always earned, by musicians' standards, a good income, and had a carriage and servants; through lavish spending and poor management he suffered times of financial difficulty and had to borrow. In 1782 he married Constanze Weber, Aloysia's younger sister.
In his early years in Vienna, Mozart built up his reputation by publishing (sonatas for piano, some with violin), by playing the piano and, in 1782, by having an opera performed: Die Entführung aus dem Serail, a German Singspiel which went far beyond the usual limits of the tradition with its long, elaborately written songs (hence Emperor Joseph II's famous observation, 'Too many notes, my dear Mozart'). The work was successful and was taken into the repertories of many provincial companies (for which Mozart was not however paid). In these years, too, he wrote six string quartets which he dedicated to the master of the form, Haydn: they are marked not only by their variety of expression but by their complex textures, conceived as four-part discourse, with the musical ideas linked to this freshly integrated treatment of the medium. Haydn told Mozart's father that Mozart was 'the greatest composer known to me in person or by name; he has taste and, what is more, the greatest knowledge of composition'.
In 1782 Mozart embarked on the composition of piano concertos, so that he could appear both as composer and soloist. He wrote 15 before the end of 1786, with early 1784 as the peak of activity. They represent one of his greatest achievements, with their formal mastery, their subtle relationships between piano and orchestra (the wind instruments especially) and their combination of brilliance, lyricism and symphonic growth. In 1786 he wrote the first of his three comic operas with Lorenzo da Ponte as librettist, Le nozze di Figaro: here and in Don Giovanni (given in Prague, 1787) Mozart treats the interplay of social and sexual tensions with keen insight into human character that - as again in the more artificial sexual comedy of Cosi fan tutte (1790) - transcends the comic framework, just as Die Zauberflöte (1791) transcends, with its elements of ritual and allegory about human harmony and enlightenment, the world of the Viennese popular theatre from which it springs.
Mozart lived in Vienna for the rest of his life. He undertook a number of joumeys: to Salzburg in 1783, to introduce his wife to his family; to Prague three times, for concerts and operas; to Berlin in 1789, where he had hopes of a post; to Frankfurt in 1790, to play at coronation celebrations. The last Prague journey was for the premiere of La clemenza di Tito (1791), a traditional serious opera written for coronation celebrations, but composed with a finesse and economy characteristic of Mozart's late music. Instrumental works of these years include some piano sonatas, three string quartets written for the King of Prussia, some string quintets, which include one of his most deeply felt works (K516 in g Minor) and one of his most nobly spacious (K515 in C), and his last four symphonies - one (no.38 in D) composed for Prague in 1786, the others written in 1788 and forming, with the lyricism of no.39 in E-flat, the tragic suggestiveness of no.40 in g Minor and the grandeur of no.41 in C, a climax to his orchestral music. His final works include the Clarinet Concerto and some pieces for masonic lodges (he had been a freemason since 1784; masonic teachings no doubt affected his thinking, and his compositions, in his last years). At his death from a feverish illness whose precise nature has given rise to much speculation (he was not poisoned), he left unfinished the Requiem, his first large-scale work for the church since the c Minor Mass of 1783, also unfinished; a completion by his pupil Süssmayr was long accepted as the standard one but there have been recent attempts to improve on it. Mozart was buried in a Vienna suburb, with little ceremony and in an unmarked grave, in accordance with prevailing custom.