User:Markalexander100~enwiki/Lao

In his later years and after his death, Bach’s reputation as a composer declined: his work was regarded as old-fashioned compared to the emerging classical style. He was far from forgotten, however: he was remembered as a player and teacher, and as father of his children (most notably C. P. E. Bach). In this period, his best-appreciated compositions in this period were his keyboard works, in which field other composers continued to acknowledge his mastery. Mozart and Beethoven were among his most prominent admirers. On a visit to the Thomasschule in Leipzig, Mozart heard a performance of one of the motets (BWV 225) and exclaimed, "Now, here is something one can learn from!"; on being given the parts of the motets, "Mozart sat down, the parts all around him, held in both hands, on his knees, on the nearest chairs. Forgetting everything else, he did not stand up again until he had looked through all the music of Sebastian Bach". Beethoven was also a devotee, learning the Well-Tempered Clavier as a child and later calling Bach "Urvater der Harmonie" ("original father of harmony") and "nicht Bach, sondern Meer" ("not a stream but a sea", punning on the literal meaning of the composer's name). 

The revival in the composer's reputation among the wider public was prompted in part by Johann Nikolaus Forkel's 1802 biography, which was read by Beethoven among others. Goethe became acquainted with Bach's works relatively late in life, through a series of performances of keyboard and choral works at Bad Berka in 1814 and 1815; in a letter of 1827 he compared the experience of listening to Bach’s music to “eternal harmony in dialogue with itself”. . But it was Felix Mendelssohn who did most to revive Bach’s reputation with his 1929 Berlin performance of the St. Matthew Passion. Hegel, who attended the performance, later called Bach a, "grand, truly Protestant, robust and, so to speak, erudite genius which we have only recently learned again to appreciate at its full value". . Mendelssohn’s promotion of Bach, and the growth of the composer’s stature, continued in subsequent years. The Bach Gesellschaft (or Bach Society) was founded in 1850 to promote the works, and over the next half century it published a comprehensive edition.

Therafter Bach’s reputation has remained consistently high. During the 20th century the process of recognising the musical as well as the pedagogic value of some of the works has continued, perhaps most notably in the promotion of the Cello Suites by Pablo Casals. Another development has been the growth of the authentic or period performance movement, which attempts to present the music as the composer intended it. Examples include the playing of keyboard works on the harpsichord rather than a modern grand piano, and the use of small choirs or single voices instead of the larger forces favoured by 19th and early 20th century performers.