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Christianity became the official religion of the empire during the reign of emperor Theodosius I.
King Ezana of Aksum established the kingdom's official religion of Christianity during his reign.
Emperor Constantine made Christianity the official religion of the Roman Empire during his reign.
Christianity became the official religion of the Roman Empire under the reign ofA. Constantine.B. Augustus Caesar.C. the Bishop of Rome.D. Justinian
Zoroastrianism is the new religion that arose during the reign of Darius. This monotheistic faith was founded by the prophet Zoroaster (or Zarathustra) and became the official religion of the Persian Empire under Darius. It emphasizes the concepts of good and evil, free will, and the importance of individual choice in determining one's fate.
No. Christianity did not appear until after the reign or age of Augustus. Jesus himself was not executed until the reign of Tiberius and it took about 380 years before it became the official religion of the empire.
Christianity
Probably the ancient Egyptian religion.
hindu
Although there was no official state religion during the Sui Dynasty, Buddhism became the de facto state religion during Emperor Wen's reign. Confucianism was also present but in decline and Taoism retained a strong following.
Atheism is not a religion. It is a lack of one. And, to my knowledge, there are countries with no official religion, but not countries with atheism as their standard 'religion' or lack thereof. In Stalin's reign during WWII, atheism was considered to be the only acceptable belief, but there is not much else other than that.
Zoroastrianism - the cult of Ahura Mazda.