The Eiffel Tour, built in 1889 by Gustave Eiffel, was almost knocked down in 1909. Musee du Louvre was once a royal palace and is now one of the most well known art museums in the world. Cathedral Notre Dame de Paris was built between 1162 and 1345. Palace of Versailles was the center of political power in 1682 when King XIV moved from Paris. Mont Blano is the highest mountain in the Alps. Chateaux de la Loire was the playground to royalty from the 15th to 18th centuries. Carcasonne is Europe's largest walled city and one of the finest examples of medieval architecture. Lascaux has the finest prehistoric art collections from ancient cave paintings, drawings, and carvings dating as far back as 35,000 years ago. The Arc de Triomphe is another place to visit.