Green Chimneys is a 32-bar AABA composition in Ab minor by Thelonious Monk, first recorded for his 1968 Columbia Records album Underground. It stands as one of the relatively few Monk originals written in a minor key, setting it apart from his more frequently performed major-key swingers like Well, You Needn't and Rhythm-A-Ning. The tune is built on a medium swing feel around 192 bpm and showcases Monk's trademark angular melodic construction, with phrasing that moves dynamically across bar lines and harmonies full of his signature dissonance. Though it qualifies as a jazz standard and appears in fake books, Green Chimneys occupies a place closer to a deep cut in Monk's catalog compared to ubiquitous titles like Round Midnight or Straight, No Chaser, which makes it a rewarding choice for improvisers seeking less-trodden Monk repertoire. Monk's own piano solo on the original recording is notable for its use of ninths, arpeggios, and triplet lines, and transcriptions of both his solo and Charlie Rouse's tenor saxophone solo from that session circulate widely in jazz education. Among later interpretations, Andy Summers's 2005 guitar-driven rendition on his album Green Chimneys: The Music of Thelonious Monk offered a distinctly different textural approach, while tenor saxophonist Alan Skidmore was among the earliest artists to cover the tune after its release.