This monumental 250m² glass roof is one of the masterpieces of the Nancy School glass painter, Jacques Gruber. It illuminates the bank's lobby. Clematis wind around the metal structure reproduced on the glass. In the center, the monogram CL recalls the bank's name. If the bank is closed, don't hesitate to enter: the glass door to the left of the metal shutter at the lobby entrance allows you to glimpse it.