James R. Thompson Center

The James R. Thompson Center (JRTC) is located at 100 W. Randolph Street in the Loop, Chicago, Illinois and houses offices of the State of Illinois. The building opened in May 1985 as the State of Illinois Center. It was re-designed in 1993 to honor former Illinois Governor James R. Thompson. The property takes up the entire block bound by Randolph, Lake, Clark and LaSalle Streets, one of the 35 full-size city blocks within Chicago's Loop.

The building is noteworthy because of its 17-story, all-glass exterior, which conveys an image of pure postmodernism; the effect is striking, especially from the Daley Center. Visitors to the JRTC's interior can see all 17 floors layered partway around the building's immense skylit atrium.