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").
Three Piano Sonatas, WoO 47 (Beethoven)
The Three Early Piano Sonatas, WoO 47, "Kurfürstensonaten" were composed by Ludwig van Beethoven in 1782 and 1783, when he was twelve and thirteen years old. The sonatas show a certain level of precocity and serve as a precursor to the masterworks he later produced. They are dedicated to the Elector (Kurfürst) Maximilian Frederick.