Eiffel Tower

The Eiffel Tower is a massive lattice tower located on the Champ de Mars in Paris, France.

It is constructed primarily from wrought iron, which earned it the local nickname "La dame de fer," or the "Iron Lady."

The tower was built to serve as the centerpiece for the 1889 World's Fair, also known as the Exposition Universelle. This event was held to celebrate the centennial anniversary of the French Revolution. Today, the tower is a global cultural icon and one of the most recognizable structures on Earth.

The design of the tower began with two senior engineers, Maurice Koechlin and Émile Nouguier.

They worked for the Compagnie des Établissements Eiffel. In May 1884, Koechlin sketched a concept for a great pylon. This design featured four lattice girders that stood apart at the base. These girders converged at the top and were joined by metal trusses at regular intervals. To improve the aesthetic appeal, Stephen Sauvestre added decorative arches to the base. He also included a glass pavilion on the first level. Gustave Eiffel eventually bought the patent rights for the design. He presented the plans to the French government in March 1885.

Construction of the tower was a complex engineering feat that required extreme precision.

Work on the foundations began on January 28, 1887. The east and south legs rested on four concrete slabs each. The north and west legs were more difficult because they were near the river Seine. Engineers used compressed-air caissons to install piles for these legs. These caissons were driven to a depth of 15 meters. Each leg rested on a block of limestone with an inclined top. This top supported a metal shoe anchored by large bolts. The drawing office produced 1,700 general drawings and 3,629 detailed drawings for the project.

Once the foundations were set, the ironwork erection began on June 30, 1887. The tower is composed of 18,038 individual pieces. These components were manufactured at a factory in Levallois-Perret. They were transported to the site on horse-drawn carts.

Workers joined these pieces using 2.5 million rivets. No drilling or shaping was done on the construction site. If a part did not fit perfectly, it was sent back to the factory. During construction, the legs were built as cantilevers. A large timber scaffold was later used to ensure structural integrity. This period caused some public concern regarding the stability of the tower.

At the time of its completion, the tower was a record-breaking structure. It was the first structure in the world to surpass both the 200-meter and 300-meter marks.

During construction, it surpassed the Washington Monument to become the tallest human-made structure in the world. It held this title for 41 years until the Chrysler Building was finished in 1930. Because of a broadcasting aerial added in 1957, the tower is now taller than the Chrysler Building. Excluding transmitters, it is the second tallest free-standing structure in France, following the Millau Viaduct.

Not everyone was happy with the design when it was first proposed. A group called the "Committee of Three Hundred" formed to protest the tower.

This group included famous artists and architects like Charles Garnier. They published a petition titled "Artists against the Eiffel Tower." Some critics believed the metal structure was impractical or lacked beauty. Gustave Eiffel defended his work by comparing it to the Egyptian pyramids. He argued that the tower would be a grandiose and admirable edifice. Over time, many protesters changed their minds as the tower became a symbol of France. In 1918, the poet Guillaume Apollinaire even wrote a poem in the shape of the tower.

The tower remains a massive destination for global tourism. It has three levels available for visitors. The first and second levels contain restaurants.

Visitors can ascend the tower by stairs or by lift. The climb from the ground to the first level is over 300 steps. The climb from the first to the second level is also over 300 steps. This makes the total staircase ascent 600 steps. The top level features the highest public observation deck in the European Union. Gustave Eiffel even built a private apartment on the third level. He used this space to host famous guests, such as Thomas Edison.

The Eiffel Tower's importance is reflected in its visitor numbers. In 2015, 6.91 million people ascended the tower. In 2022, the monument received 5,889,000 visitors.

It is recognized as the most visited monument with an entrance fee in the world. The tower was designated a historic monument in 1964. In 1991, it became part of the UNESCO World Heritage Site known as "Paris, Banks of the Seine." It continues to serve as a vital piece of French cultural and architectural history.