The survey and excavation databases, which were made up of tens of thousands of sites, were used to map the general ... It seems the Roman Empire entered the 7th century at the peak of its power.

This story appears in the January/February 2017 issue of National Geographic History magazine. The emperor Hadrian was well known for building monuments across the Roman Empire, a territory that ...

of rivers and canals Map reveals how much it would have cost to travel on roads and seas across the empire in 200 CE It calculates the route based on the season, or mode of transport chosen - and ...

What would Rome and the Roman Empire have been like without their aqueducts ... which had about 1,000,000 people at its peak, without its large aqueducts. The Romans could have obtained their ...