Kuinka suuri oli Rooman valtakunta kultakaudellaan?
The Empire reached its largest expanse under Trajan (reigned 98–117), encompassing an area of 5 million square kilometres. The traditional population estimate of inhabitants accounted for between one-sixth and one-fourth of the world's total population and made it the largest population of any unified political entity in the West until the mid-19th century. Recent demographic studies have argued for a population peak ranging from to more than . Each of the three largest cities in the Empire—Rome, Alexandria, and Antioch—was almost twice the size of any European city at the beginning of the 17th century.
5 million square kilometres