The Eiffel Tower was built for the 1889 Paris Exposition and was not intended to be permanent.
The Exposition Universelle of 1889 was a world’s fair held in Paris, France, from 5 May to 31 October 1889. It was the fourth of eight expositions held in the city between 1855 and 1937. It attracted more than thirty-two million visitors. The most famous structure created for the Exposition, and still remaining, is the Eiffel Tower.
Source, Image credit: state.gov