When opened in 1930, the Merchandise Mart or the Mart, located in Chicago, Illinois, was the largest building in the world with 4,000,000 square feet (372,000 m2) of floor space.
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World`s Biggest Office Complex in Chicago
When opened in 1930, the Merchandise Mart or the Mart, located in Chicago, Illinois, was the largest building in the world with 4,000,000 square feet (372,000 m2) of floor space.
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