Paris is the capital and most populous city of France, with an estimated population of 2,175,601 residents as of 2018, in an area of more than 105 square kilometres (41 square miles). Since the 17th century, Paris has been one of Europe’s major centres of finance, diplomacy, commerce, fashion, science and arts. The City of Paris is the centre and seat of government of the Île-de-France, or Paris Region, which has an estimated official 2017 population of 12,174,880, or about 18 percent of the population of France. Paris is especially known for its museums and architectural landmarks: the Louvre was the most visited art museum in the world in 2019, with 9.6 million visitors. However, the number of visitors plunged by 72 percent to 2.7 million visitors in 2020, due to the COVID virus and the drop in the number of foreign visitors. The Musée d’Orsay, Musée Marmottan Monet, and Musée de l’Orangerie are noted for their collections of French Impressionist art. The Pompidou Centre Musée National d’Art Moderne has the largest collection of modern and contemporary art in Europe. The Musée Rodin and Musée Picasso exhibit the works of two noted Parisians. The historical district along the Seine in the city centre is classified as a UNESCO Heritage Site, and popular landmarks there included the Cathedral of Notre Dame de Paris on the Île de la Cité, now closed for renovation after the 15 April 2019 fire. Other popular tourist sites include the Gothic royal chapel of Sainte-Chapelle, also on the Île de la Cité; the Eiffel Tower, constructed for the Paris Universal Exposition of 1889; the Grand Palais and Petit Palais, built for the Paris Universal Exposition of 1900; the Arc de Triomphe on the Champs-Élysées, and the Basilica of Sacré-Coeur on the hill of Montmartre. The flag of Paris is vertically divided between the traditional colours of Paris, blue and red, both of which also feature in the city’s coat of arms. Blue is identified with Saint Denis, red with Saint Martin. The colours of Paris are the origin of the blue and red stripes in the French flag, the white stripe symbolising the monarchy. The French flag’s colours were adopted as a cockade during the early stages of the French Revolution, when the country was still in the process of becoming a constitutional monarchy. Full HD.