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Bio
The list of compositions of Ludwig van Beethoven consists of 722 works written over forty-five years, from his earliest work in 1782 (variations for piano on a march by Ernst Christoph Dressler) when he was only eleven years old and still in Bonn, until his last work just before his death in Vienna in 1827. Beethoven composed works in all the main genres of classical music, including symphonies, concertos, string quartets, piano sonatas and opera. His compositions range from solo works to those requiring a large orchestra and chorus. Beethoven straddled both the Classical and Romantic periods, working in genres associated with Wolfgang Amadeus Mozart and his teacher Joseph Haydn, such as the piano concerto, string quartet and symphony, while on the other hand providing the groundwork for other Romantic composers, such as Hector Berlioz and Franz Liszt, with programmatic works such as his Pastoral Symphony and Piano Sonata "Les Adieux". Beethoven's work is typically divided into three periods: the "Early" period, where he composed in the "Viennese" style; the "Middle" or "Heroic" period, where his work is characterised by struggle and heroism, such as in the Eroica Symphony, the Fifth Symphony, the Appassionata Sonata and in his sole opera Fidelio; and the "Late" period, marked by intense personal expression and an emotional and intellectual profundity. Although his output greatly diminished in his later years, this period saw the composition of masterpieces such as the late string quartets, the final five piano sonatas, the Diabelli Variations, the Missa Solemnis and the Ninth Symphony. Beethoven's works are classified by both genre and various numbering systems. The best-known numbering system for Beethoven's works is that by opus number, assigned by Beethoven's publishers during his lifetime. Only 172 of Beethoven's works have opus numbers, divided among 138 opus numbers. Many works that were unpublished or published without opus numbers have been assigned one of "WoO" (Werke ohne Opuszahl—works without opus number), Hess or Biamonti numbers. For example, the short piano piece "Für Elise" is more fully known as the "Bagatelle in A minor, WoO 59 ('Für Elise')". Some works are also commonly referred to by their nicknames, such as the Kreutzer Violin Sonata, or the Archduke Piano Trio. Works are also often identified by their number within their genre.