The next concerto, No. 14 (K. 449) in E major, ushers in a period of creativity that has certainly never been surpassed in piano concerto production. From February 1784 to March 1786, Mozart wrote no fewer than 11 masterpieces, with another (No. 25, K. 503) to follow in December 1786. The advance in technique and structure from the early Vienna examples is marked from the very first of this mature series.
