Ludwig van Beethoven's Piano Concerto No. 4 in G major, Op. 58, was composed in 1805–1806. Beethoven was the soloist in the public premiere as part of the concert on 22 December 1808 at Vienna's Theater an der Wien. Orchestration It is scored for solo piano and an orchestra consisting of a flute, two oboes, two clarinets, two bassoons, two horns, two trumpets, timpani, and strings. Premiere and reception It was premiered in March 1807 at a private concert of the home of Prince Franz Joseph von Lobkowitz. The Coriolan Overture and the Fourth Symphony were premiered in that same concert. However, the public premiere was not until a concert on 22 December 1808 at Vienna's Theater an der Wien. Beethoven again took the stage as soloist. The marathon concert saw Beethoven's last appearance as a soloist with orchestra, as well as the premieres of the Choral Fantasy and the Fifth and Sixth symphonies. Beethoven dedicated the concerto to his friend, student, and patron, the Archduke Rudolph. A review in the May 1809 edition of the Allgemeine musikalische Zeitung states that "[this concerto] is the most admirable, singular, artistic and complex Beethoven concerto ever". However, after its first performance, the piece was neglected until 1836, when it was revived by Felix Mendelssohn. Today, the work is frequently recorded, and it is a favorite of concert audiences. It is also considered by many to be one of the pinnacles of the piano concerto repertoire. Structure I. Allegro moderato The first movement opens with the solo piano, playing simple chords in the tonic key before coming to rest on a dominant chord. The orchestra then enters with the same theme, in B major, the major mediant key, which is in a chromatic mediant relationship to the tonic. Thus enters the first theme. The orchestra states the main theme in B major, dropping through the circle of fifths to a cadence in the tonic, G major. The theme is then stated again, this time in stretto between upper and lower voices. A very strong cadence in the tonic, withering away within one bar, introduces a transitional, modulatory theme with restless triplet accompaniment, also containing hints of stretto. The music moves to the minor mediant key, B minor, while its dynamic is reduced to pianissimo, at which point material from the opening theme returns. Through a rising bass line and sequential harmonies, the music