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The Merchandise Mart takes shape during  construction Sept. 17, 1929.
Chicago Tribune historical photo
The Merchandise Mart takes shape during  construction Sept. 17, 1929.
Chicago Tribune
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Chicago’s skyline is one of the most well-known all over the world, but it has taken about a century to erect. Here’s a look at the evolution of the city’s high-rises via photos from the Chicago Tribune’s archives.