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").
Sonatina in G major (attributed to Beethoven)
The Sonatina in G major is a composition for solo piano attributed to Ludwig van Beethoven (listed as Anh. 5 No. 1 in the Kinsky–Halm Catalogue). The work was published in Hamburg, Germany, after Beethoven's death; its authenticity is doubtful, as it uses styles never seen by Beethoven before.