On February 12, 1963, construction began on the Gateway Arch, launching the two-and-a-half year, $13 million build-out of the tallest national monument in the country. In honor of the anniversary this week, we've assembled historic photos below.
Courtesy of the Missouri History Museum and the Jefferson National Expansion Memorial, here are some shots of the monument's creation half a century ago -- brought to you as officials today are making plans for the site's redevelopment.
Continue for more photos.
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