Cello Sonata in C major, op. 119

Sergei Prokofiev began composing his Sonata for Solo Cello, Op. 134, in 1952. The sonata was intended to be written in four movements, but as it was one of seven compositions which the composer was writing during this time, only the beginning of the first movement (marked Andante) was completed before Prokofiev's death in March 1953.
While the first subject of the exposition of the Andante was written entirely by Prokofiev, the second subject was partially written by his friend, the cellist Mstislav Rostropovich. Prokofiev's writing resumes at the beginning of the development section of the Andante, yet the rest of the movement – and the rest of the sonata – was left unwritten. Years later, in 1972, the Russian musicologist and composer, Vladimir Blok, set about completing Prokofiev's Sonata for Solo Cello as a single, performable movement.