Constantine, the son of Augustus Constantinius Chlorus and Helena, was proclaimed the Augustus of the Western Roman Empire upon the death of his father on July 25th, 306 CE. He became the sole ruler of the empire after the Battle of Milvian Bridge in 312 and the defeat of Licinius in 324, after which he re-United the Empire under his reign. Building Constantinople, “Constantine’s City” or “New Rome”, he created the new capital of the empire. He would go on to revolutionize and reform coinage, with his reign introducing a new “form” of gold called solidus. He played a crucial role in the Christianization of the Roman World, getting baptized on his deathbed and leaving the standards for future emperors.