This is the story of how a city ruled the world. For 500 years, across 2 million square miles, Rome fought, And reigned and got rich. Today, experts are still trying to understand how. In the ruins of its port. In the mountain of evidence its people left behind and on the furthest borders of its empire. They find the secrets of the Romans success. They see ambition, innovation, and a genius for organisation. Diplomacy, brutality, and insatiable greed, while many remember its decadence and decline, this is the roman miracle: 5 centuries, as the greatest power on earth.