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 Concerto No. 5 (Beethoven)
The Piano Concerto No. 5 in E major, Op. 73, by Ludwig van Beethoven, popularly known as the Emperor Concerto, was his last completed piano concerto. It was written between 1809 and 1811 in Vienna, and was dedicated to Archduke Rudolf, Beethoven's patron and pupil. The first performance took place on 13 January 1811 at the Palace of Prince Joseph Lobkowitz in Vienna, with Archduke Rudolf as the soloist, followed by a public concert on 28 November 1811 at the Gewandhaus in Leipzig under conductor Johann Philipp Christian Schulz, the soloist being Friedrich Schneider. On 12 February 1812, Carl Czerny, another student of Beethoven's, gave the Vienna debut of this work.