The sway at the top of this masterpiece of tensile strength and lightness has never been more than 12 cm.
The metal tower was built in two years by the engineer, Eiffel, for the world exhibition of 1889.
The tower is 300 m high and weighs 7,000 tonnes (a scale model 30 cm high would only weigh 7 grams).
Three platforms (57 m, 115 m and 274 m) offer a view over Paris and the suburbs.



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