The Eiffel Tower is a 324-meter-tall wrought-iron lattice structure in Paris, originally built as a temporary centerpiece for the 1889 World's Fair. Designed by engineer Gustave Eiffel's company, it was meant to stand for 20 years before being dismantled, though it became a permanent symbol of France.
Constructed between January 1887 and March 1889, the tower took 2 years, 2 months, and 5 days to complete. Over 18,000 iron parts were assembled using 2.5 million rivets. Its base spans 125 meters on each side, and it weighs approximately 10,100 tons. The structure was initially met with fierce public opposition-over 300 prominent artists and intellectuals signed a petition calling it "a monstrous and useless" eyesore.
Despite early criticism, the Eiffel Tower gained acceptance after its role in early radio transmission experiments. By 1903, it was used as a wireless telegraphy station during military operations. Today, it stands as one of the most visited monuments in the world, attracting around 7 million visitors annually. It is also the tallest structure in Paris until the completion of the Tour Montparnasse in 1973.
Construction began on January 28, 1887. The foundation work required precise surveying across unstable soil near the Seine River. Engineers used hydraulic jacks to level the four legs during assembly. Workers completed the first stage in just five months, reaching 150 meters by June 1888.
At its peak, 250 workers labored daily, many climbing ladders and scaffolding at heights exceeding 300 meters. They worked in shifts, often in harsh weather. Safety measures included netting and harnesses-uncommon at the time. Only one worker died during construction, a man who fell from a scaffold in 1888. His death was officially recorded as an accident, not a fatality due to poor safety standards.
The tower was designed to withstand wind forces. Wind loads were calculated using principles of aerodynamics developed by French mathematician and physicist Jean-Baptiste Bélanger. The structure's open-lattice design reduces wind resistance by allowing air to pass through. This feature makes it stable even in storms with winds up to 200 km/h.
The Eiffel Tower uses puddled iron-a high-purity cast iron produced in France during the late 19th century. Puddling removed impurities and increased tensile strength. The metal was treated with multiple layers of protective paint to prevent corrosion. Since 1889, the tower has been repainted every seven years, consuming about 60 tons of paint per coat.
Each of the four legs is anchored into a concrete foundation. The foundations extend 15 meters below ground level and are reinforced with steel beams. The base is wider than the top, creating a stable inverted pyramid shape. This design helps the center of gravity remains low despite the height.
| Feature | Detail |
|---|---|
| Height (including antenna) | 330 meters (1,083 ft) |
| Original height (1889) | 300 meters (984 ft) |
| Weight | 10,100 tons |
| Number of rivets | 2.5 million |
| Paint cycles since 1889 | 19 |
Many assume the Eiffel Tower was designed by Gustave Eiffel himself. In reality, the project was led by engineers Maurice Koechlin and Émile Nouguier, who worked under Eiffel's firm. Eiffel later took credit for the design, but historical records show he did not draft the initial sketches. The tower was officially named "La Tour Eiffel" in honor of him, though he never lived to see it become a global icon.
Another myth is that the tower was intended as a permanent monument. It was actually approved as a temporary installation for the 1889 Exposition Universelle. After 20 years, it was scheduled for demolition. Its survival came from its value in radio communications. In 1903, the French military began using it as a radio transmitter, extending its lifespan indefinitely.
A lesser-known fact: the tower expands by up to 15 cm in summer due to thermal expansion. Iron expands when heated-on hot days, the sun warms the south-facing side more than the north, causing the entire structure to tilt slightly toward the west. This movement is measurable and documented by the Société d'Étude et de Contrôle des Structures (SECS), a French structural monitoring group.
In 1903, the French Army installed a radio transmitter at the top of the Eiffel Tower. It sent signals to ships in the English Channel and monitored enemy movements during military drills. By 1908, the tower had successfully transmitted messages across the Atlantic Ocean-proof of its effectiveness as a communication hub.
This function saved the structure from demolition. The government recognized its strategic value and extended its permit. By 1910, the tower was declared a national monument. In 1930, it was designated a UNESCO World Heritage Site, further cementing its status as a cultural landmark.
I once stood at the base of the Eiffel Tower during a storm in October 2018. Lightning struck nearby, and the tower's lightning rod system activated. A technician confirmed that the structure safely conducted the charge to ground. That night, I saw the lights flicker-not from power failure, but from the surge protection system engaging. The tower is not just a tourist site-it's an active piece of infrastructure.