"The Glass Chain" (Die Gläserne Kette in its native German) was an exchange of written letters initiated by Bruno Taut in November 1919. The correspondence lasted only a year, and included the likes of Walter Gropius, Hans Scharoun, and Paul Gösch. In the letters, the penfriends—thirteen in all—speculated and fantasized about the possibilities of glass, imagining, in the words of Fredrik Hellberg and Lara Lesmes (Space Popular), "fluid and organic glass follies and colourful crystal cathedrals covering entire mountain chains and even reaching into space."
