Paris is the capital of France and has over 10 million inhabitants. It is known for landmarks like the Eiffel Tower, the largest monument in the city built by Gustave Eiffel, and the Louvre museum which was formerly a royal residence and now contains famous works like the Mona Lisa. The underground metro system is also very popular among Parisians, with each station named after a famous French figure and an average of 19,000 daily journeys.