And because I've never seen this before and finally had the idea to search for it ... this was Georges Schriqui's proposal for a 6 million square foot, 114-story tower on Central and Roosevelt. Schriqui could have done this had the city played ball--he had deep connections and lots of experience in Europe.
https://www.newspapers.com/clip/75560761/
https://www.newspapers.com/clip/75560908/
https://www.newspapers.com/clip/75563538/
It was later declared a hazard by the FAA for being over 1000' high, a competing proposal was in fact put up by a landowner in the project area of 3 45 story towers surrounding a one acre lake, but after the city wanted a "blank check" of $50,000 for earnest money and demanded he help pay for airport modifications that ended up happening anyways like the runway extensions that reconfigured 24th St and the third runway to the south for light aircraft.
The world's tallest building concept was scrapped for potentially smaller towers in February. But given that he was basically made a pariah and state and city leaders didn't lobby to work with the FAA as part of an "unstable political climate," the project was put on a "deep hold." Cultural differences were also at work--Europeans were have said to agree a project and do it, whereas Schriqui likely didn't like the death by committee and lawyers approach. After years of work, it was dead by 1990.