Glass Chain

The Glass Chain or Crystal Chain sometimes known as the "Utopian Correspondence" (German: Die Gläserne Kette) was a chain letter that took place between November 1919 and December 1920. It was a correspondence of architects that formed a basis of expressionist architecture in Germany. It was initiated by Bruno Taut.

Names, pen-names, and locations of participants

Name	pen-name	location
Wilhelm Brückmann	Berxback 7	Emden
Hermann Finsterlin	Prometh	Stuttgart
Paul Gösch	Tancred	Berlin
Jakobus Göttel	Stellarius	Cologne
Walter Gropius	Maß	Weimar
Wenzel Hablik	W.H.	Itzehoe
Hans Hansen	Antischmitz	Cologne
Carl Krayl	Anfang	Tuttlingen
Wassili Luckhardt	Zacken	Berlin
Hans Luckhardt	Angkor	Berlin
Hans Scharoun	Hannes	Insterburg
Bruno Taut	Glas	Berlin
Max Taut	No Name	Berlin

Bibliography

Sharp, Dennis (1966). Modern Architecture and Expressionism. George Braziller: New York.
Whyte, Iain Boyd ed. (1985). Crystal Chain Letters: Architectural Fantasies by Bruno Taut and His Circle. The MIT Press. ISBN 0-262-23121-2
Benson, Timothy. O. (et al.); Dimenberg, Edward (2001-09-17). Expressionist Utopias: Paradise, Metropolis, Architectural Fantasy (Weimar and Now: German Cultural Criticism). University of California Press. ISBN 0-520-23003-5.