Bulletproof glass, metal fences to protect Eiffel Tower against terrorist attacks
The boosted security measures, under construction since last year, come with France still on high alert after a string of jihadist attacks that have killed more than 240 people since 2015.
The new walls, shown to journalists during a site tour on Thursday, are part of security measures that have cost nearly 35 million euros ($40.7 million) and are due to be finished by mid-July.
Glass walls measuring 6.5 centimetres (2.5 inches) thick will run along the riverside Quai Branly boulevard as well as the Avenue Gustave Eiffel which separates the tower from a park.
The walls, which are bulletproof as well as resistant to vehicle-ramming attacks, are "rock-solid for absolute security", said Bernard Gaudillere, head of the SETE, the company which runs the Eiffel Tower.
The other two sides will be fenced off with metal barriers formed from curved prongs in the form of the tower itself and at 3.24 metres high, stand exactly a hundredth of the height of the "Iron Lady".
Gaudillere said his team worked with police to decide how best to secure a monument which has itself repeatedly switched off its twinkling night-time lights in memory of the victims of attacks around the world.
Like other French tourist sites, the tower is regularly patrolled by anti-terror troops, and the forecourt underneath the iron structure has been fenced off over terrorism fears since June 2016. ■