Some 70,000 law enforcement officers will be deployed across France while the Louvre and several other major Paris museums will be closed as authorities seek to prevent renewed violence during planned protests.
Protests last week devolved into mayhem, with people setting fires, storming public buildings, smashing shop windows, looting and clashing with police. It was France's most violent unrest in years.
Demonstrators plan to take to the streets again Saturday to denounce the high cost of living. Students, members of the CGT labour union and activists from the "yellow vest" movement, whose demonstrations against social injustice shook France in 2018 and 2019, are all set to join.
French Interior Minister Laurent Nuñez said some 70,000 police officers and gendarmes would be deployed, along with helicopters, armoured vehicles and water cannons. In addition, elite police units will help secure public buildings like city halls in a "highly mobile" security operation, he said.
"There have been numerous calls from radical far-left groups on social media to commit acts of violence and vandalism. There have also been renewed calls for looting, with those messages clearly being spread by rioters," Nuñez said at a news conference.
"We will be absolutely uncompromising" with those involved in violence, he added, warning that police will have a "very firm approach".
In a statement to The Associated Press, the Culture Ministry said the Louvre, the Orsay and Picasso museums as well as the Grand Palais would be closed.
The ministry called on all institutions under its authority to adopt any necessary measures to ensure "visitor safety, staff protection and the preservation of artworks," according to the statement.
One of the world's most prestigious contemporary art fairs, Art Basel, closed after only one day open to the public in Paris, with organisers taking the decision to prioritise everyone's safety.
A demonstration Saturday in the city of Orléans, about 110km south of Paris, will also be closely watched.
About 50 organisations have called for a protest against the far right on the sidelines of the two-day congress of Marine Le Pen's nationalist, anti-immigration party ahead of next spring's presidential election. Organisers include labour unions, left-wing political parties, student organisations and anti-racism groups.
Hugues Moutouh, the prefect of the Loiret region, said that 20,000 to 30,000 demonstrators from across the country were expected.
Le Pen, whom opinion polls place as the front-runner in next year's election, accused left-wing organisations and political parties of trying to "disrupt a political party's democratic congress," on news broadcaster Franceinfo.
Still, she said she had "no concerns" about security because the government had "recognised the need for measures allowing the congress to proceed safely."