Vast expanses amaze with their scale: from the shores of the Mediterranean Sea to the northern borders of Scotland and Great Armenia in Europe. How was unity maintained? Alberto Angela explains: thanks to a single currency, an extensive road network, and a wise ruler-monarch. The image of the emperor on a coin becomes your guide through an exciting journey. The coin moves from legionary to singer, from slave to surgeon, from sailor to philosopher—and through many hands it eventually returns to the very emperor. We’ll dive into the everyday life of people from all social classes during their heyday and try to understand why this period became the last.