The 'Piano Concerto No. 1' in B-flat minor, Op. 23, is one of the most popular of Tschaikowsky's compositions and among the best known of all piano concertos. The concerto follows the traditional form of three movements. The introduction's theme is notable for its apparent formal independence from the rest of the movement. Despite its very substantial nature, this theme is only heard twice, and it never reappears at any later point in the concerto. But everyone can point this concerto by hearing only the first 4 notes of the concerto. Dutch arranger Jos van de Braak transcribed the complete concerto for piano with accompaniment of a Symphonic Band.