How Did Mozart Altered Sonata Form

known that most, if not all, of his cadenzas have been lost over the years. For this specific con- certo, the most popularly performed cadenzas are not Mozart’s own, but cadenzas by Beethoven and Brahms.
Mozart is known to have established the key features of the classical era concerto form and style. After Mozart’s bravura and flashy concertos were written for his subscription concerts, many composers after him followed this idea and the solo parts progressively became more diffi- cult, demanding, and virtuosic. One of these key features that have stuck in the concerto for many centuries after Mozart’s death was the general use of a sonata form as the concerto. The first movement was in a slightly altered sonata form at a moderate to allegro