Unfortunately, Ludwig was completely unsuitable for raising his nephew, he did not lead a stable life and was not consistent in his upbringing. His protégé even tried to take his own life, which completely devastated the master. His professional activity also declined, and in the years 1817-1819 he created only one work (considered a masterpiece) - the Great Sonata in B flat major, Op. 106 "Hammerklavier".
