The iron lattice Eiffel Tower – held together by 2.5 million rivets – is 125 years old this year.
The iconic French structure is visited by seven million people every year, with thousands climbing the 1,665 steps from ground level to the top of the tower. The 1,063-ft tower is equivalent to an 81-story building.
French engineer Gustave Eiffel designed and constructed the tower in 1889 for the 100th anniversary of the French Revolution. About 300 laborers installed the rivets and 18,038 pieces of wrought iron in the temporary structure, anticipated to be torn down in 20 years. (…)
via Eiffel Tower Held Together By 2.5 Million Rivets for 125 Years – Global Fastener News – USA.