stained glass, Coloured glass used to make decorative windows and other objects through which light passes. Stained glass is often made in large, richly detailed panels that are set together in a framework of lead. Like all coloured glass, it acquires its colour by the addition of metallic oxides to molten glass. A purely Western phenomenon, stained glass originated as a fine art of the Christian church, beginning in the 12th–13th century, when it was combined with Gothic architecture to create brilliant, moving effects. A decline set in after the 13th century, when stained-glass artists began to seek the realistic effects sought by Renaissance painters, effects to which the technique was less suited and which diverted artists from exploiting the all-important light-refracting quality of glass. More recently, stained-glass artists again achieved high quality: during the 19th-century Gothic revival, in the Art Nouveau designs of Louis Comfort Tiffany, and in the work of such 20th-century artists as Marc Chagall.
