The Eiffel Tower, which is normally open every day of every year, is closed due to a strike over salaries and working conditions.
The company that manages the tower, SETE, apologized to visitors on Tuesday and said that negotiations were underway between management and staff to try to reach a solution that would allow the attraction to reopen.
company official said unions decided to strike after a meeting on Tuesday, amid disagreements over pay and conditions.
The strike comes as Paris is struggling to revive tourism after a string of deadly attacks.
The 19th-century monument sees millions of visitors every year from around the world, many of whom climb 906 feet for its stunning views of the City of Light.