information:extraction, structural:summarization, stylistic:tone
Glass art

Glass art was a medium in which Art Nouveau found new and varied ways of expression. Intense amount of experimentation went on, particularly in France, to find new effects of transparency and opacity: in engraving win cameo, double layers, and acid engraving, a technique that permitted production in series. The city of Nancy became an important centre for the French glass industry, and the workshops of Émile Gallé and the Daum studio, led by Auguste and Antonin Daum, were located there. They worked with many notable designers, including Ernest Bussière, Henri Bergé (illustrateur), and Amalric Walter. They developed a new method of incrusting glass by pressing fragments of different coloured glass into the unfinished piece. They often collaborated with the furniture designer Louis Majorelle, whose home and workshops were in Nancy. Another feature of Art Nouveau was the use of stained glass windows with that style of floral themes in residential salons, particularly in the Art Nouveau houses in Nancy. Many were the work of Jacques Grüber, who made windows for the Villa Majorelle and other houses.

In Belgium, the leading firm was the glass factory of Val Saint Lambert, which created vases in organic and floral forms, many of them designed by Philippe Wolfers. Wolfers was noted particularly for creating works of symbolist glass, often with metal decoration attached. In Bohemia, then a region of the Austro-Hungarian Empire noted for crystal manufacture, the companies J. & L. Lobmeyr and Joh. Loetz Witwe also experimented with new colouring techniques, producing more vivid and richer colours. In Germany, experimentation was led by Karl Köpping, who used blown glass to create extremely delicate glasses in the form of flowers; so delicate that few survive today.

In Vienna, the glass designs of the Secession movement were much more geometrical than those of France or Belgium; Otto Prutscher was the most rigorous glass designer of the movement. In Britain, a number of floral stained glass designs were created by Margaret Macdonald Mackintosh for the architectural display called The House of an Art Lover.

In the United States, Louis Comfort Tiffany and his designers became particularly famous for their lamps, whose glass shades used common floral themes intricately pieced together. Tiffany lamps gained popularity after the World's Columbian Exposition in Chicago in 1893, where Tiffany displayed his lamps in a Byzantine-like chapel. Tiffany experimented extensively with the processes of colouring glass, patenting in 1894 the process Favrile glass, which used metallic oxides to colour the interior of the molten glass, giving it an iridescent effect. His workshops produced several different series of the Tiffany lamp in different floral designs, along with stained glass windows, screens, vases and a range of decorative objects. His works were first imported to Germany, then to France by Siegfried Bing, and then became one of the decorative sensations of the 1900 Exposition. An American rival to Tiffany, Steuben Glass, was founded in 1903 in Corning, N.Y., by Frederick Carder, who, like Tiffany, used the Fevrile process to create surfaces with iridescent colours. Another notable American glass artist was John La Farge, who created intricate and colourful stained glass windows on both religious and purely decorative themes.

Examples of stained glass windows in churches can be found in the Art Nouveau religious buildings article.