Constantine the Great was the Roman emperor from 306 AD to 337 AD. He legalized Christianity in the Roman Empire, and had all non-Christian religions persecuted. He made sure no Pagan temples were built. He had all Pagan temples pillaged and destroyed. The only Christians he persecuted were a group called the Donatists. He also made the empire's attitude towards Jews worse than before. He desired to annihilate all non-Christian religion, but luckily didn't have the means, and all he had was the means to rob and destroy Pagan temples.