Your answer will be true.
Answer:
Byzantium.
Explanation:
The Byzantine Empire was originally a Roman colony known as Byzantium, and after the Romans got sacked by Barbarians, it was the last part of Rome that existed. It became its own empire since 330 AD.
original source A direct source of information or research
Primary source. In the study of history as an academic discipline, a Primary Source (also called an original source or evidence) is an artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was created at the time under study. It serves as an original source of information about the topic.
Frederick II
joseph II
catherine the great