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Christianity took root in the Eastern Roman Empire, also known as the Byzantine Empire. The empire became Christianized under the rule of Emperor Constantine, and the official religion shifted from paganism to Christianity. The Eastern Orthodox Church emerged as the dominant Christian faith in the Byzantine Empire.
orthodox Christianity
Christianity
Christianity
Islam became a rival of Christianity in the Byzantine Empire.
Orthodox Christianity.
It was Orthodox Christianity.
Islam became the strongest rival of Christianity in the Byzantine Empire.
The form of Christianity based on Greek heritage practiced in the Byzantine Empire is Eastern Orthodox.
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