Allegro E-flat major 4/4 time

A large-scale movement that, while following the concerto-sonata form, incorporates many innovative ideas. The solo piano's cadenza-like introduction is woven in a manner resembling a confrontation with the full orchestral tutti. From m. 11, the orchestra introduces the majestic first theme, followed by the second theme in the parallel key (from m. 41) and the tonic key (from m. 49). Following a transition based on material from the first theme (from m. 57), a contrapuntal codetta (from m. 78) leads to the entrance of the solo instrument. The first theme, presented by the piano solo, is transformed into a gentle character with ornamental variations, while the second theme, played by the piano solo in the high register, evokes a purified, celestial sound. The descending figuration in the piano solo appearing in the transition section (from m. 217) also possesses a purity reminiscent of the sound of a clear stream. The heroic character seen at the beginning reappears at the climax of the development section (from m. 304), where one might perceive Beethoven's rebellious spirit and anti-war sentiment. In the piano solo just before the recapitulation, a prayer ascends to heaven and fades away.