There are some of the ruins left of such a large Empire.
Some Latin writings.
Part of the Amphitheater where Christians were killed for amusement.
Here is the way the Romans had the blood drained after the fights in the amphitheater.
These ruins of Colonia Ulpia Traiana Augusta Dacica Sarmizegetusa were part of Trajan's expedition trying to conquer Dacia around 101-106 AD. In the end the city was destroyed by the Goths.