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Eiffel Tower, French Tour Eiffel, Parisian landmark that is also a technological masterpiece in building-construction history. When the French government was organizing the International Exposition of 1889 to celebrate the centenary of the French Revolution, a competition was held for designs for a suitable monument. More than 100 plans were submitted, and the Centennial Committee accepted that of the noted bridge engineer Gustave Eiffel. Eiffel’s concept of a 300-metre (984-foot) tower built almost entirely of open-lattice wrought iron aroused amazement, skepticism, and no little opposition on aesthetic grounds. When completed, the tower served as the entrance gateway to the exposition.

Nothing remotely like the Eiffel Tower had ever been built; it was twice as high as the dome of St. Peter’s in Rome or the Great Pyramid of Giza. In contrast to such older monuments, the tower was erected in only about two years (1887–89), with a small labour force, at slight cost. Making use of his advanced knowledge of the behaviour of metal arch and metal truss forms under loading, Eiffel designed a light, airy, but strong structure that presaged a revolution in civil engineering and architectural design. And, after it opened to the public on May 15, 1889, it ultimately vindicated itself aesthetically.

The Eiffel Tower stands on four lattice-girder piers that taper inward and join to form a single large vertical tower. As they curve inward, the piers are connected to each other by networks of girders at two levels that afford viewing platforms for tourists. By contrast, the four semicircular arches at the tower’s base are purely aesthetic elements that serve no structural function. Because of their unique shape, which was dictated partly by engineering considerations but also partly by Eiffel’s artistic sense, the piers required elevators to ascend on a curve; the glass-cage machines designed by the Otis Elevator Company of the United States became one of the principal features of the building, helping establish it as one of the world’s premier tourist attractions.

The tower itself is 300 metres (984 feet) high. It rests on a base that is 5 metres (17 feet) high, and a television antenna atop the tower gives it a total elevation of 324 metres (1,063 feet). The Eiffel Tower was the tallest structure in the world until the topping off of the Chrysler Building in New York City in 1929.

Gustave Eiffel, in full Alexandre-Gustave Eiffel, (born Dec. 15, 1832, Dijon, France—died Dec. 28, 1923, Paris), French civil engineer renowned for the tower in Paris that bears his name.

Eiffel, Gustave

Eiffel, Gustave

After graduation from the College of Art and Manufacturing in 1855, Eiffel began to specialize in metal construction, especially bridges. He directed the erection of an iron bridge at Bordeaux in 1858, followed by several others, and designed the lofty, arched Gallery of Machines for the Paris Exhibition of 1867. In 1877 he bridged the Douro River at Oporto, Port., with a 525-foot (160-metre) steel arch, which he followed with an even greater arch of the same type, the 540-foot (162-metre) span Garabit viaduct over the Truyère River in southern France, for many years the highest bridge in the world, 400 feet (120 m) over the stream. He was one of the first engineers to employ compressed-air caissons in bridge building. He designed the movable dome of the observatory at Nice and the framework of the Statue of Liberty in New York Harbor.

Eiffel startled the world with the construction of the Eiffel Tower (1887–89), which brought him the nickname “magician of iron.” It also directed his interest to problems of aerodynamics, and he used the tower for a number of experiments. At Auteuil, outside Paris, he built the first aerodynamic laboratory, where he continued to work throughout World War I; in 1921 he gave the laboratory to the state.