This Piano Sonata in C mjor, one of eight sonatas in this key, is one of Haydn's best-known piano pieces , and one of the first encountered by budding pianists in their lessons. In 1780 it opened a cycle of six sonatas for the pianistically proficient Auenbrugger sisters. The first movement – with 170 measures is quite long for Haydn's standards – is followed by a relatively simple Adagio and a whimsical finale which, with its theme in 3/4 time and the trio-like c-minor middle section, evokes a minuet.