Thème de la semaine sur le Daily-post : Weekly Photo Challenge: Masterpiece
In France, during the 16th century in Troyes, Masters glaziers assembled differently the glass, as here: the mouth, or the stars somewhere else. This methodoligy is called : "Masterpiece". Glass part set in the middle of another part so that the lead which surround it does not contact the lead network of the panel. This part is often the secret of reading of the stained glassed window.