The romans learned how to use the arch, the vault, and the dome. A vault is an arch to support a roof. The romans were also the first to make widespread use of concrete. With the use of concrete, they were able to make much bigger arches than anyone had ever attempted before. Aspects of Romes architecture is still used today. One Roman innovation that was widely copied is the triumphal arch. An example of this is the Arc de Triomphe in Paris, France.
The Romans also invented a new kind of building, the stadium. This was a large, open-air structure. The Romans used concrete to build tunnels into the famous Colosseum in Rome, these tunnels made it easy for spectators to reach their seats.
Engineering
Romans were the greatest builders of roads, bridges, and aqueducts in the ancient world. Their techniques set the standard of road building for 2,000 years.
About fifty thousand miles of road connected Rome with the frontiers of the empire.