Empire builders. Christian empires Byzantium, crusaders and Venice

In the fifth century A.D. the Roman Empire, which had ruled across Europe for 600 years, was facing collapse. More than 100 years earlier in 332 its Emperor Constantine, who d erected his victory arch in Rome, had moved the capital of the empire to a city in modern day Turkey which was named Constantinople. Constantine was the first Roman emperor to become a Christian and over the next 1000 years his Eastern Roman Empire embraced Christianity and...