CHRISTIANITY’S CHAMPION. Nearly 6 feet tall, this massive bronze head of Constantine the Great dates to the fourth century C.E. Ruler of the Roman Empire from 306 to 337 C.E., Constantine played a significant role in the spread of Christianity. Not only did he proclaim Christianity a lawful religion in 325, but he also was baptized on his deathbed in 337. By 450 C.E.—a century and a quarter after its legalization—Christianity had become the predominant religion in Egypt.