Expressionist architecture developed in early 20th century Europe in parallel with expressionist art movements. It sought to transform reality rather than imitate it through distorting forms for emotional effect. Notable expressionist architects included Erich Mendelsohn, Eero Saarinen, and Bruno Taut. Mendelsohn's Einstein Tower in Potsdam used organic, amorphous forms to symbolize Einsteinian concepts. Saarinen's TWA Terminal at JFK Airport sculpted dramatic curves to express the excitement of travel. Taut's Glass Pavilion at the 1914 Werkbund Exhibition in Cologne was one of the first buildings made entirely of glass, using it to provoke vivid human experiences.