The Piano Sonata, WoO 51, in C major (also called the Sonatina in C major), is an incomplete composition for piano by Ludwig van Beethoven, believed to have been composed before he left Bonn, that was discovered amongst Beethoven's papers following his death.
[1] Beethoven is believed to have begun composing the sonata some time around 1790–91 for Eleonore von Breuning on the basis of a letter to her from 1796 in which he announced that a sonata that he had promised to her some time previously would be sent to her.
For publication in 1830 Ferdinand Ries composed an additional eleven measures of music to complete the second movement.
[2] The composition as published is in two movements: A typical performance takes around 6 to 7 minutes.
Notes Sources This article about a sonata is a stub.