section_path: Music/The three periods
section_name: The three periods
paragraph_text: The three periods
  
  The historian William Drabkin notes that as early as 1818 a writer had proposed a three-period division of Beethoven's works and that such a division (albeit often adopting different dates or works to denote changes in period) eventually became a convention adopted by all of Beethoven's biographers, starting with Schindler, F.-J. Fétis and Wilhelm von Lenz. Later writers sought to identify sub-periods within this generally accepted structure. Its drawbacks include that it generally omits a fourth period, that is, the early years in Bonn, whose works are less often considered; and that it ignores the differential development of Beethoven's composing styles over the years for different categories of work. The piano sonatas, for example, were written throughout Beethoven's life in a progression that can be interpreted as continuous development; the symphonies do not all demonstrate linear progress; of all of the types of composition, perhaps the quartets, which seem to group themselves in three periods (Op. 18 in 1801–1802, Opp. 59, 74 and 95 in 1806–1814, and the quartets, today known as 'late', from 1824 onwards) fit this categorization most neatly. Drabkin concludes that "now that we have lived with them so long... as long as there are programme notes, essays written to accompany recordings, and all-Beethoven recitals, it is hard to imagine us ever giving up the notion of discrete stylistic periods."