Piano sonatas (Beethoven)
Ludwig van Beethoven wrote his 32 piano sonatas between 1795 and 1822. Although originally not intended to be a meaningful whole, as a set they compose one of the most important collections of works in the history of music. Hans von Bülow called them "The New Testament" of the piano literature (Johann Sebastian Bach's "The Well-Tempered Clavier" being "The Old Testament").
Piano Sonata No. 16 (Beethoven)
Due to his dissatisfaction with the classical style of music, Beethoven pledged to take a new path of musical composition and style. The Opus 31 works are the first examples of Beethoven's new and unconventional ideas, an attempt to make a name for himself in the annals of music history. For example, the first movement, unlike most sonata allegro forms, which the second theme of the exposition is dominant, the second theme is in B major and B minor, the mediant of the original key. Beethoven would later continue to use the mediant and submediant as expositional goals for major-key sonata-form movements, such as the first movements of the Waldstein and Hammerklavier sonatas, the Archduke trio, the triple concerto and the thirteenth string quartet, as well as the finale to the seventh symphony. It is important to take into account that these pieces were written after the famous Heiligenstadt Testament of 1802.