The Chant de paix by Jean Langlais is part of the Neuf Pièces pour Grand Orgue, published in 1945. It is dedicated to one of his former students, Claire Boussac, whose “peaceful soul”, and “calm and serene” personality he appreciated.

In the palette of blues this window is composed of, Marc Chagall has placed a large white bird bearing a twig – maybe an olive branch, recalling the dove of peace in the story of Noah.