Eiffel Tower Building in New York City was topped out. The tower has lost its standing both as the world's tallest structure and the world's tallest lattice tower but retains its status as the tallest freestanding (non-guyed) structure in France. Notes Bibliography Eiffel Tower The Eiffel Tower ( ; ) is a wrought-iron lattice tower on the Champ de Mars in Paris, France. It is named after the engineer Gustave Eiffel, whose company designed and built the tower. Constructed from 1887–1889 as the entrance to the 1889 World's Fair, it was initially criticized by some of France's leading artists and intellectuals for
Eiffel Tower gaps in the latticework. In the years since it was completed, engineers have put forward various mathematical hypotheses in an attempt to explain the success of the design. The most recent, devised in 2004 after letters sent by Eiffel to the French Society of Civil Engineers in 1885 were translated into English, is described as a non-linear integral equation based on counteracting the wind pressure on any point of the tower with the tension between the construction elements at that point. The Eiffel Tower sways by up to 9 centimetres (3.5 in) in the wind. When originally built, the first