The Eiffel Tower, located on the Champ de Mars in Paris, was built for the 1889 World's Fair to celebrate the centennial of the French Revolution. Designed by Gustave Eiffel, the structure was originally intended to be dismantled after 20 years. However, its value as a radiotelegraph station saved it from destruction. Standing at 330 meters, it was the world's tallest man-made structure until the completion of the Chrysler Building in 1930. The tower is made of puddle iron, which expands in the sun, causing the tower to grow up to 15 centimeters in the summer. It is repainted every seven years with 60 tons of paint to prevent rust. Today, it is the most-visited paid monument in the world, serving as a global symbol of France and an architectural marvel of the industrial age.