Jacques Gruber (1870-1936) is one of the founders of the Nancy school. He gave his letters of nobility to French stained glass, notably by daring to superimpose acid-etched glass, thus giving depth and great readability to the motifs.
The flowers are made of doubled glass, worked with acid and the leaves are painted with grisaille. The whole is set with lead. There is a crack on one of the nasturtiums and on the mauve net and there is dirt between the 2 glasses of one of the flowers.