The Eiffel Tower was built by Gustave Eiffel for the 1889 Exposition Universals, which was to celebrate the 100th year anniversary of the French Revolution.
During its construction it took 2 years, 2 months, and 5 days to build the tower.
It was intended to only 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 program in 1925, and then broadcast television up to TNT more recently.
The Eiffel Tower stands at 1083 feet tall. And is taller by up to 6 inches in the summer months.