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Ludwig van Beethoven wrote his 32 mature piano sonatas between 1795 and 1822. (Before it, he wrote also 3 juvenile sonatas at the age of 13.; He also wrote 1 unfinished sonata, WoO. 51) Although originally not intended to be a meaningful whole, as a set they comprise one of the most important collections of works in the history of music. Hans von Bülow called them "The New Testament" of the piano ... Wikipedia