It's control of the peoples within it and secure border control.
It didn't solely - it failed through the overwhelming influx of Eurasian peoples.
There have been tons of European empires, either based out of or in Europe. They include the Roman Empire, Macedonian Empire, British Empire, Holy Roman Empire, and Russian Empire.
Simply, the Roman Empire divided into the Western Roman Empire (based in Rome) and the Easter Roman Empire (based in Constantinople). Once the western empire fell, the Eastern Orthodox and Roman Catholic churches diverged and evolved in isolation. The full history is significantly more complex, but that is the answer in a nut-shell.
The foot BEE-OTCH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
based on paces
At its peak power the Roman Empire was the same type of society it had always been. It was a classed based society.
No similarities. The Roman Empire was an ancient empire and the Carolingian Empire was a medieval one and therefore related to two totally different societies. The only thing was that Latin was the language of the church, bureaucrats and intellectuals.
Justinian was a Roman emperor and his empire was the Roman empire.Justinian was a Roman emperor and his empire was the Roman empire.Justinian was a Roman emperor and his empire was the Roman empire.Justinian was a Roman emperor and his empire was the Roman empire.Justinian was a Roman emperor and his empire was the Roman empire.Justinian was a Roman emperor and his empire was the Roman empire.Justinian was a Roman emperor and his empire was the Roman empire.Justinian was a Roman emperor and his empire was the Roman empire.Justinian was a Roman emperor and his empire was the Roman empire.
The length of three hands.
They built straight roads
Constantinople was the capital of the Roman/Byzantine Empire 330 to 1204 and 1261 to 1453
It restructured itself and continued on for another thousand years. Today we call it the Byzantine Empire as it was based on Byzantium, renamed Constantinople.