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. 30 (Beethoven)
The date of the first performance is unknown. The first pianists to undertake to bring Beethoven's last sonatas, including Op. 109, to public attention were Franz Liszt, who regularly included them in his programs between 1830 and 1840, and Hans von Bülow, who even included several of the late sonatas in one evening.