It was at the 1889 Exposition Universelle, the date that marked the 100th anniversary of the French Revolution, that a great competition was launched in the Journal Officiel. The first digging work started on the 28th January 1887. On the 31st March 1889, the Tower had been finished in record time – 2 years, 2 months and 5 days – and was established as a veritable technical feat.