Here are the answers to your questions:
-
Who made Christianity the official religion of the Roman Empire?
- Answer: Theodosius I
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Which emperor is often regarded as the most important of the Byzantine Emperors?
- Answer: Justinian I
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Who was known as the Bulgar Slayer?
- Answer: Basil II
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Which emperor commissioned the construction of the Hagia Sophia?
- Answer: Justinian I
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What was Alexios I Komnenos' role in the First Crusade?
- Answer: He provided support to the Crusaders and ensured their safe passage through Byzantine territory