Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Ancient City of Tauric Chersonese and its Chora' has mentioned 'Byzantium' in the following places:
Occurrence Sentence Text Source
It was useful to Byzantium in two ways: it was an observation point to watch the barbarian tribes, and its isolation made it a popular place of exile for those who angered the Roman and later Byzantine governments.