The 31st March marks the 125th anniversary of the completion of the Eiffel Tower.
Now the world's most visited paid-for tourist attraction, the tower was originally built as the centre-piece of the 1899 Exposition Universelle, a fair to mark the centenary of the French Revolution.
The Eiffel Tower was re-opened following a bomb threat that caused the attraction to be evacuated.
A tourist visiting the Eiffel Tower has tweeted that police have set up a barricade around the Eiffel Tower after visitors were made to evacuate using the stairs:
The Eiffel Tower was completely evacuated on Friday afternoon following a bomb alert, a police official told Reuters.
The major tourist attraction was evacuated around 2pm (1pm UK time) and had not reopened to tourists by 4pm (3pm UK time). The police official could give no further details.
It is regularly subject to bomb scares but these threats are usually quickly found to be hoaxes and only cause full evacuations a couple of times a year.