Question: What philanthropic Roman emperor ruled during the time of the group of ten cities on the eastern frontier of the Roman Empire that were centers of Greek and Roman culture in an otherwise Semitic-speaking region?
Sentence (from "Byzantine Empire"): The Byzantine Empire, also referred to as the Eastern Roman Empire, was the continuation of the Roman Empire in the East during Late Antiquity and the Middle Ages, when its capital city was Constantinople (modern-day Istanbul, which had been founded as Byzantium).
Relevant evidence: No