24 Preludes and Fugues

The 24 Preludes and Fugues, Op. 87 by Dmitri Shostakovich are a set of 24 musical pieces for solo piano, one in each of the major and minor keys of the chromatic scale. The cycle was composed in 1950 and 1951 while Shostakovich was in Moscow, and premiered by pianist Tatiana Nikolayeva in Leningrad in December 1952; it was published the same year. A complete performance takes approximately 2 hours and 32 minutes. It is one of several examples of music written in all major or minor keys.