ultrafacts:The Romans used methods to make it stable….

ultrafacts:

The Romans used methods to make it stable. There’s a supportive ring around the outside of the dome, arches made within the dome, and the concrete is cutout in patterns that seem to be decorative, but also serve to lighten it a great deal. Upon this, the Romans had created several types of concrete, concrete that can rival or in certain conditions surpass modern concrete.

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