The concept of transparency that has dominated dis- Cessions about parliamentary buildings in Germany For decades is captured by the cupolas in a surprising, Innovative and entirely direct manner. With the use of Glass material perfectly, Foster was able not only to Make functional use of the principle of transparency, but Also to create a powerful symbol. By day, when visitors Are sketchily visible on the double helix of the ramp, but Even more so at night, when the glazed structure shines Like a beacon, the cupola is a sign, in the best sense of The world. All of these are supposed to be contributed to The application of glass.