It goes without saying that the Eiffel Tower is the symbol of the city. It is the first stop for visitors coming to Paris. It is the most important attraction in the lists of places to see in Paris. The Eiffel Tower was built between 1887 and 1889. The construction was based on the project of Gustave Eiffel as the gateway to the 1889 Paris world's fair. 3,000 workers assembled 18,038 pieces of iron, using more than 2.5 million rivets, in 26 months. The fact that there was not a serious work accident is a surprising when considering the working conditions of that time. Since its opening, the Eiffel Tower has been visited by more than 200 million people.