Answer: protector
Explanation:
The role that the Byzantine Empire occupy for Christian Europe was that of protector.
Under the Byzantine empire, Christianity was given imperial preference as it was supported and protected. Christians were given administrative posts, clerics were not expected to pay taxes and bishops were given judicial responsibilities.
It ended because China came in and raided their villages.
A settlement owned and ruled by a different country is a colony, if that's what you are asking
