A symphony in this key has a fourth movement made up of variations on a melody previously used in the composer's ballet The Creatures of Prometheus.
One work in this key opens with a sequence of three chords: a third on the tonic, a fifth on the dominant, and an unexpected chord in its relative key. Above those three chords, the composer wrote the syllables of that movement's title. In the first movement of another work in this key, the oboes unusually introduce a new theme in E minor in the middle of the development. The Les Adieux piano sonata is in this key, and its composer wrote another work in this key in which the orchestra plays three fortissimo chords separated by short (*) cadenza- like passages played by the soloist. A symphony in this key has a fourth movement made up of variations on a melody previously used in the composer's ballet The Creatures of Prometheus. That symphony was dedicated to "the memory of a great man." For 10 points, name this key that Beethoven used in "heroic" works like the Emperor Piano Concerto and the Eroica Symphony, the relative major of C minor.
One work in this key opens with a sequence of three chords: a third on the tonic, a fifth on the dominant, and an unexpected chord in its relative key.
E-flat major [prompt on "E-flat," do not accept or prompt on "E-flat minor" or "E major"]