<human>:  What is the history of the Eiffel Tower?
<bot>: The Eiffel Tower is a wrought iron lattice tower located on the Champ de Mars in Paris, France. It was constructed in 1889 as the entrance to the 1889 World's Fair, commemorating the centenary of the French Revolution. The tower stands 324 metres (1,063 feet) tall and has become a global icon of France and one of the most recognizable structures in the world. Designed by Gustave Eiffel, the tower is the tallest structure in Paris, and the most-visited paid monument in the world. It has become an iconic symbol of France and the city of Paris, and is one of the most popular tourist attractions in France, with millions of visitors each year.