This is a time lapse of the Eiffel Tower being built.
Time Line of the Eiffel Tower:
Construction of the Eiffel Tower started in 1887 and was completed in 1889. At the time, the tower was the tallest structure in the world standing at almost 1000 ft tall. The Eiffel Tower was built for the World's Fair in Paris, the World's Fair celebrated the 100th anniversary of the French Revolution in 1789.
Originally, the tower was only supposed to stay up for 20 years. In 1909, that would mark 20 years which led to it almost being torn down. However, city officials decided not to tear it down due to it's value as a radiotelegraph station.
During World War 1, the Eiffel Tower intercepted enemy radio communications and also it relayed Zeppelin alerts. - (The Germans used Zeppelins to bomb and observe military activity of enemy regions. The Zeppelin alerts were used to dispatch emergency troop reinforcements.)