Gustave Eiffel, the architect of the Eiffel Tower (Tour Eiffel) could never have guessed that it would become Paris’s signature sight and attract more than six million visitors a year. It was built as a temporary structure to commemorate the centenary of the French Revolution and was opened by the Prince of Wales, later King Edward VII of England. It was considered an eyesore by many and there were petitions to have it pulled down. It was saved only because it had become an important antenna for telegraphy. It towers 984ft (300m) above the Champ de Mars and until 1930 was the world’s tallest building. The highest of its three levels offers a wonderful panoramic view over Paris.