Paris (nicknamed the "City of light") is the capital city of France, and the largest city in France. The area is 105 square kilometres (41 square miles), and around 2.15 million people live there. If suburbs are counted, the population of the Paris area rises to 10.7 million people. It is the most densely populated city in the European Union, with 20.653 people per square kilometer. The Seine river runs through the oldest part of Paris, and divides it into two parts, known as the Left Bank and the Right Bank. It is surrounded by many forests.