Marc Chagall was approached in 1959 to propose a stained glass project for the two bays of Metz Cathedral's north ambulatory. He chose episodes from the Old Testament. Transcribing his interpretation of biblical texts on glass was entrusted to the workshop of master glassmakers Simon-Marq in Reims. The loose work of Chagall borrowed all the resources from engraving and glass painting. It also conceals an encrypted message despite the master's desire to carry a Judeo-universal language understandable by all.