No. It was the only empire to adopt the Orthodox version of Christianity, but the Roman Empire did practice Roman Catholicism at a time.
Many other later European Empires also allowed Christianity, heading the crusades and converting parts of present-day Russia.
Some examples of such empires would be the British Empire, the German Empire, the Spanish Empire, and the French Empire.
Christianity
Islam became a rival of Christianity in the Byzantine Empire.
The form of Christianity based on Greek heritage practiced in the Byzantine Empire is Eastern Orthodox.
orthodox Christianity
Orthodox Christianity.
Christianity
Christianity
Islam became a rival of Christianity in the Byzantine Empire.
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.
orthodox Christianity
Orthodox Christianity.
It was Orthodox Christianity.
The religion of the eastern empire was Orthodox Christianity.
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It changed it by changing it.
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