extracted from
http://www.endex.com/gf/buildings/eiffel/eiffelfacts.html
TOWER BASICS
Years Built: 1887-1889 for 1889 Universal Exhibition and Centennial
of the French Revolution
Engineers : Maurice Koechlin and Emile Nouguier
Architect : Stephen Sauvestre
Contractor : Gustave Eiffel
Occasion for Construction: 1889 Universal Exhibition
Construction Period: 23 January 1887 to March 1889 (2years,2months,5days)
Tower inaugurated: March 31, 1889