The Unreinforced Concrete Dome is the Largest in the World
The dome—20 feet thick at the base, tapering to 7.5 feet thick at the oculus—is the largest unreinforced concrete dome in the world. This engineering marvel caps a 142-foot diameter rotunda with a perfect hemisphere.
Image by Bjørn Christian Tørrissen
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Posted to Throwback: The World’s Oldest Monolithic Dome—the Pantheon
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Image by Bjørn Christian Tørrissen via Monolithic Dome Institute (CC BY-SA 3.0)