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When construction of Chicago's Marina City reached completion in the 1960s, it was an architectural and social icon for the city -- and beyond. The five-building, mixed-use complex boasted the two tallest residential buildings and reinforced concrete structures in the world. It was also the largest real estate deal in the Midwest at the time, the first federally insured urban housing project, and contained the first circular apartment buildings.
This story was originally produced for the PBS NewsHour's Art Beat.