Describe symbolism in The Creators by Daniel J. Boorstin

In Section 14: Dome of the World, the Pantheon is the best preserved Roman monument, and it is the triumph of the Roman revolution in architecture as the dome proclaims the triumph of art over politics, providing a symbol of man's power to fill an empty void with his own creation. It was commissioned by Emperor Hadrian in the second century B.C., and he exploited all possibilities of concrete with bold designs and engineering technology.