Constantine was a Roman emperor known for his tolerance of Christianity throughout the Roman Empire.
When Constantine first became emperor, there were six other emperors in Rome. Constantine was an emperor in the western part of the Roman Empire. He battled with the other emperors in the areas, and he became the sole ruler of the West and Licinius ruled the East. Constantine then wanted to control the whole Roman Empire. He again battled Licinius, who was then executed. After Licinius' death, Constantine became the sole ruler of the whole Roman Empire.