In the literature on the Cathedral of Chartres, there is a gap: descriptions of the stained glass windows typically provide a very careful, yet surface-level account of the respective image content. In the work of Sophia-Janet Aleemi, one of the windows is subjected to meticulous examination for the first time, going far beyond the spiritual cosmos of the Middle Ages. In a strikingly clear style, the author leads the reader into a contemplation after describing the individual images of the John window, following the method of the School of Chartres, which could not be more engaging. The discovery of connections and their compelling interpretation can truly captivate even those who have not had the opportunity to see the window in person. Others who have already visited the site will find themselves immersed in.