[1] The earliest building is One Illinois Center designed by Ludwig Mies van der Rohe and completed in 1970.
The golf course has since been turned into a park, now surrounded by an urban village of high-rise buildings called Lakeshore East.
An additional structure, Boulevard Towers East an 80-story mixed-use building was planned on the west side of Stetson between South Water and Lake Street but was cancelled.
The site of this proposed building is the last remaining vacant lot in the Illinois Center complex, referred to by locals as the "Political Graveyard".
On February 18, 2009, a report in Crain's Chicago Business stated that a New York-based lender had filed a foreclosure suit against the developer, that the sale's center was closed and building units were no longer being marketed through the Multiple Listing Service.