Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Memphis and its Necropolis – the Pyramid Fields from Giza to Dahshur' has mentioned 'Roman Empire' in the following places:
Occurrence Sentence Text Source
Its religious significance was diminished after the abandonment of the ancient religion following the Edict of Thessalonica (380 AD), which made Nicene Christianity the sole religion of the Roman empire.
Under the Roman Empire, Alexandria remained the most important Egyptian city.