The Windmills of Your Mind - guitar chords and comments
Lyrics without distraction HERE
This song was theme song for the 1968 film "The Thomas Crown Affair" featuring Steve McQueen and Faye Dunaway. The film won no awards, but the song did: both Academy Awards and Golden Globe Awards. English actor and artist Noel Harrison performed it, after Andy Williams turning it down. Harrison himself: «It was recorded live on a huge sound stage at Paramount, with the accompanying film clips running on a giant screen and Michel blowing kisses to the orchestra.»

The English lyrics were written by famous American lyricist duo
Alan and Marilyn Bergman, and they are in my opinion among the best I've ever read and sung. French lyrics, under the title "Les Moulins de mon cœur", were written by Eddy Marnay.
The entire soundtrack was composed and arranged by Michel Jean Legrand (24 February 1932 – 26 January 2019). He was a French musical composer, arranger, conductor, jazz pianist and singer, and has written over 200 film and television scores in addition to standalone songs. With this one, he's told to have borrowed a couple of lines from Mozart's "Sinfonia concertante in E-Flat Major, K. 364: II; Andante". I've heard that concert, and did not recognize anything. Anyway, to quote my own "C Flat:C Major 9";
«by and by : where and why : I'd heard it before and just caught it»
First release was Harrison; June '69. Then following every second flippin' band and artist in show business, any category. I counted 466 main covers; then had to skip tracking adaptations, translations and instrumentals to keep my sanity. I recommend Dame Kiri Te Kanawa and Michel Legrand himself with the London Studio Orchestra from "Magic", 1992 Teldec Classics International.