Kresge Auditorium, Massachusetts Institute of Technology, United States

Kresge Auditorium was designed by the architect Eero Saarinen at the Massachusetts Institute of Technology. The auditorium is defined by an elegant thin-shell structure of reinforced concrete, one-eighth of a sphere rising to a height of 50 feet, and sliced away by sheer glass curtain walls so that it comes to earth on only three points. Thin-shelled concrete technology was innovative for the times. The dome weighs only 1200 tons and is currently clad with copper.