s of a trough on top of an arched base, the entire structure made out of stone and concrete. The Roman engineers maintained a rather constant downward slope, from the mountains to the city. The Roman army also built massive bridges, capable of supporting great weight. Many time an aqueduct and a bridge would be built on top of one another. This would obviously save a great deal of time and money. Roman bridges were especially important in the transportation on military units around the empire. The engineering discoveries of ancient Rome have played a key role in the history of architecture and engineering. Many of Romes roadways, bridges, and aqueducts have been in use from the first century until the twentieth century. Many American buildings have used the Roman dome. Several major structures from early Rome still stand, including the Collosseum. These remnants of feats of Roman engineering stand as a monument to the ability of ancient Roman builders....
