The Eiffel Tower was built by Gustave Eiffel for the 1889 Exposition Universelle, which was to celebrate the 100th year anniversary of the French Revolution. Its construction in 2 years, 2 months and 5 days was a veritable technical and architectural achievement. "Utopia achieved", a symbol of technological prowess, at the end of the 19th Century it was a demonstration of French engineering personified by Gustave Eiffel, and a defining moment of the industrial era. It was met immediately with tremendous success.
Only intended to last 20 years, it was saved by the scientific experiments that Eiffel encouraged, and in particular by the first radio transmissions, followed by telecommunications. For example, the radio signals from the Pantheon Tower in 1898; it served as a military radio post in 1903; it transmitted the first public radio programme in 1925, and then broadcast television up to TNT more recently.
Since the 1980s, the monument has regularly been renovated, restored and adapted for an ever-growing public.