Blue Cross-Blue Shield Building, Corporate skyscraper in East Randolph Street, Chicago, United States.
The Blue Cross-Blue Shield Building is a corporate tower on East Randolph Street in Chicago with 54 floors and a glass exterior. It dominates the northeastern corner of Millennium Park and contains multiple office levels serving major organizations.
The building was constructed in two phases: 33 stories in 1997, then 21 additional floors between 2007 and 2010. This vertical expansion represented an innovative approach in Chicago's construction history.
The building displays messages through its illuminated windows at night, making it a visible landmark when viewed from across the park and nearby streets.
The building is easily visible from Millennium Park and accessible on foot, making it simple to include in a walk through the area. Nearby attractions and shops are within walking distance from this location.
It was the first building in Chicago to grow upward around an existing structure rather than replacing it entirely. This technique allowed for expansion while operations continued below without interruption.
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