The Nocturnes, Op. 37 are a set of two nocturnes written and published by Frédéric Chopin in 1840, though it is thought that the Nocturne in G major, Op. 37, No. 2 was composed in 1839 around the time of his stay with author George Sand in Majorca. Unusually, neither piece carries a dedication. Gustav Barth commented that Chopin's nocturnes are definite signs of "progress" in comparison to John Field's original nocturnes, though the improvements are "for the most part only in technique." However, David Dubal feels that the pieces are "more aptly described as ballades in miniature."