Why was the Eiffel tower going to be torn down?
Eiffel had a permit for the tower to stand for 20 years, meaning
it would have had to be dismantled in 1909, when its ownership
would revert to the City of Paris. The City had planned to tear it
down (part of the original contest rules for designing a tower was
that it could be easily demolished) but as the tower proved
valuable for communication purposes, it was allowed to remain after
the expiration of the permit. The military used it to dispatch
Parisian taxis to the front line during the First Battle of the
Marne, and it therefore became a victory statue of that battle.