Nocturne in C minor, B.108

Frédéric Chopin's Nocturne No. 21 in C minor, B. 108, WN 62, KK IVb/8, P. 2/8, is a musical work for solo piano composed in 1847–1848 or 1837. It was the last of Chopin's nocturnes to be published, and was done so posthumously in 1938. It is famous for its striking simplicity and folk-like melody.