Roman Empire : its Foundation and Development

Rome occupies a unique position in the history of the world. The whole Mediterranean basin was at one time merely a Roman lake, and the adjacent countries were Roman in letters, law, religion and the practice of war. Roman roads crossed the continents east and west and penetrated to the depths of Asia and Africa. Roman garrisons were stationed in every important city of the provinces, and when the great city on the banks of the Tiber at last fell before successive irruptions of northeasterly barbarians and Roman power was at its extreme ebb, the spirit of Roman institutions still survived in the civilization of Spain, France, Italy, Britain, even in Greece and Asia.
Roman law had become the code of the world.