Eiffel Tower Architecture: Design, Structure, and Meaning

Introduction and Building Overview

Architect: Gustave Eiffel
Building Name: La Tour d'Eiffel
Date of Construction: 1887–1889 (SETE)
Location: 7th Arrondissement, Paris
Height: 312.27 m (1889)
Spanning Elements: Truss; steel and reinforced concrete
Materials: Cast iron, steel, concrete

The Eiffel Tower serves the city of Paris as a landmark. Originally built for the 1889 World Exhibition celebrating the 100th anniversary of the French Revolution, it was intended as a demonstration of what could be achieved with steel (Barthes).

The Eiffel Tower initiated a copycat movement around the world, from the Tokyo Tower to the Toronto CN Tower. It declares: "We're here, and we're special." As the first such structure of the Industrial Age, it served as a beacon for similar towers that followed. Its predecessors reach back to monuments built for kings and military victories — the victory arch (the Place de l'Étoile in Paris, the Arch of Titus in Rome), Egyptian obelisks, and pyramids that announced the power and majesty of governments and gods. Unlike those earlier monuments, however, the Eiffel Tower's function is to display technology and innovation as an end in itself.

Facade, Elevation, and Structural Design

The tower is an immense rising column that expands at the base to a width of 126.9 meters and narrows to 18.65 meters at the top. It is designed to be lightweight and to present a relatively small face to the wind, hence its lacy steelwork. It was built in four major sections: the base section is relatively massive and vault-shaped, leading to a first-level terrace; the second section leads to a second-level terrace, which houses a restaurant and shops; and the top features a small walkway affording panoramic views of the city. Remarkably, if the Eiffel Tower were enclosed in a column of air of equivalent volume, that air would weigh more than the tower's 7,300 tons of steel.

The tower's ornamentation is minimal by classical standards. It employs platforms, towers, and an arcade at the base, with its primary decorative element being the fine lacework of steel that constitutes its entire form. There are no classical orders — no Doric, Ionic, or Corinthian columns, no entablature or pediment — reflecting its identity as a product of engineering rather than classical architectural tradition.

The design is based on one of the simplest engineering principles: the triangular supporting frame. Although the technology was new at the time, the structural logic was fundamental. As Roy Huss observed:

"The Eiffel Tower may seem beautiful to some because its lines sweep gracefully heavenward like the tower of a Gothic cathedral. However, an engineer, aware of its having used a great deal more metal than necessary to support its structure, might see it as ponderously ugly." (Huss)

Materials, Light, and Ornamentation

One might imagine that had Eiffel designed the tower today, he would have eliminated the semicircular arches at the base in favor of a purer, cleaner line from base to top. In fact, during renovations in the early 1980s, over 1,600 tons of "unneeded" material were removed. Eiffel overdesigned the tower, likely due to the absence of CAD-CAM and computer-aided stress analysis. Its sheer scale conceals its massiveness when viewed up close, and contributes to its butterfly-wing delicacy when seen from a distance.

The building is made of steel and concrete — 7,300 tons of steel sitting on foundations of 2,700 tons of concrete and stone. Despite its weight and size, it reads as lacy and light. It is reduced to a structural minimum in order to achieve height, much as a giraffe has a thin but strong neck, or a butterfly has a delicate lacework structure to support its wings.

Color plays little role in the design. The tower is best experienced at night in silhouette, and its profile allows the lights and atmosphere of Paris to shine through its latticework. The steel lattice structure is, in every sense, the reason for the tower's construction. It announces: "Before me, it was impossible to make such a tall, massive, and yet light and lacy structure." It is an unambiguous advertisement for the then-new virtues of strength and lightness offered by iron and steel.

There is significant visual rhythm and repetition of elements in the lattice pattern. The first section, with its super-strong, heavy vault base, seems somewhat at odds with the rest of the structure. The semicircular vault support does not find repetition in any other part of the building, suggesting it was added when Eiffel recognized that the full structure required a stronger foundation than originally planned.