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The metal structure of the Eiffel Tower has a mass of 7300 tons, or 7.3 million kilograms. The design of the tower is very space-efficient: if you melted down the pure iron* that it is made of, it would occupy a volume of only 930m3, equivalent to a sphere with a radius of just six metres.
The City of Light finds its loveliest expression in the Eiffel Tower by night -- one of the most romantic views on earth. See more pictures of famous landmarks. Bridge engineer Gustave Eiffel designed the tower, exulting that the French flag is the only one with a 300 meter pole.. (At 984 feet, the tower ranked as the world's tallest structure for decades; modern television transmitters on top have elevated it to the present 1,063 feet.) Eiffel's drawings were so precise, giving details for more than 18,000 metal parts, that the tower was erected in just a little more than two years.