Paris will next month unveil new perimeter defences around the Eiffel Tower to protect against terror threats.
Temporary barriers were placed around the tower in June 2016 and are being replaced with more permanent measures costing nearly €35 million ($58.5m).
More than 240 people have died in terror attacks in France since 2015.
Bernard Gaudillère, president of the Société d'Exploitation de la Tour Eiffel which runs the monument, said the new walls were "rock-solid for absolute security".
Bulletproof glass walls measuring 6.5cm thick will form two sides of the square, with the other two blocked off by 3.24m high metal barriers, one-hundredth the height of the tower.