The Eiffel Tower is a true technical feat, a summary of the genius of French engineering at the beginning of the industrial era and a demonstration of French know-how. It was designed by Maurice Koechlin (head of the design office at Eiffel & Cie) and Emile Nouguier (head of the methods office at Eiffel & Cie), and the plan was subsequently improved by the architect Stephen Sauvestre.
Gustave Eiffel bought back the patent registered on 18 September 1884 and succeeded in "selling" the project, which eventually won unanimous approval from all the other candidates proposing projects for the 1889 Universal Exhibition. Work began on 28 January 1887 and in just two years, two months and five days, the people of Paris saw the world's tallest tower rise.