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Chicago, Illinois
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Spanning over 2.5 million square feet, the Old Chicago Post Office holds the title as the largest post office globally, a testament to its historical significance and architectural grandeur.
Constructed in 1921, the building was designed to handle the massive volume of mail generated by companies like Sears and Montgomery Ward.
After closing in 1997, the building remained unused until redevelopment plans were initiated in the late 2010s.
The building's architectural style is a blend of Art Deco and Moderne, featuring intricate detailing and grandiose interiors.
Its distinctive architecture and vast spaces have made it a popular filming location for movies like 'The Dark Knight' and 'Transformers: Dark of the Moon.'
The redevelopment of the building includes a massive rooftop park, offering green space and stunning views of the Chicago skyline.
At its peak, the facility processed over 19 million pieces of mail daily, serving as a crucial hub for the nation's postal service.
The building features an extensive network of tunnels that were used to transport mail efficiently throughout the facility.