The building and its plaza (known as Exelon Plaza, after a prominent tenant of the building) occupy the entire block bounded by Clark, Dearborn, Madison, and Monroe Streets.
Chase Tower is known for both its distinctive curving shape and its vibrant public space: a deep sunken plaza at the geographic center of the Chicago Loop formed by the elevated train tracks, complete with a jet fountain and Marc Chagall's ceramic wall mural Four Seasons.
The building's name was changed from Bank One Tower on October 24, 2005, as a result of a corporate merger. Earlier the plaza was named First National Plaza. When constructed it was home to the First National Bank of Chicago.
The 56th floor of the building contains a full-floor private club that is available for event rental.