The Guardian's Rowan Moore assembled his list of the best concrete buildings in the world. As one would assume his top-10 begins with one of the most well-known concrete buildings in the world, The Pantheon of Rome.

The ancient Romans didn't have reinforced concrete (that is, strengthened with steel) but they had concrete, and used it to such heart-stopping effect on the Pantheon that no one has really been able to match it since. The true moment of genius is the way in which, after a certain amount of harrumphing with Corinthian columns and marble decoration at its lower levels, the design resolves itself into the pure circular oculus at its top, unglazed, which causes a beam of light to rake around the interior like an internalized sun.

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