Roman bridge

Puente Romano, Mérida, the world's longest (still in use) surviving Roman bridge

The ancient Romans were the first civilization to build large, permanent bridges.[1] Early Roman bridges used techniques introduced by Etruscan immigrants, but the Romans improved those skills, developing and enhancing methods such as arches and keystones. There were three major types of Roman bridge: wooden, pontoon, and stone. Early Roman bridges were wooden, but by the 2nd century BC stone was being used. Stone bridges used the arch as their basic structure, and most used concrete, the first use of this material in bridge-building.

  1. ^ O'Connor 1993, p. 1

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