Paris is the largest city and the capital of the French Empire and is the world's largest city. It is located at the river Seine in Île-de-France, which is located at Northern France. Paris, by its administrative limits, has changed a lot during the regimes of the Bonapartes, which continues to the present day. It has more people than any other city, marking at 21,560,000 people at its administartive limits, though the whole metropolitan area marks at 42,230,000 people, the second most populous megalopolis after the Tokyo-Yokohama Megalopolis. For 1,000 years, Paris has been the largest city in Western Europe, but since the 16th century, it has achieved being the largest city in the world and still holds this rank to this day.