The trial is set to open into the terrorist attacks which left around 130 dead in Paris more than six years ago.
Gunmen with suicide vests attacked six bars and restaurants, the Bataclan concert hall and a sports stadium in the French capital in November 2015 in a deadly jihadist rampage, which also wounded hundreds.
Scores of police gathered around the Palais de Justice courthouse in central Paris ahead of the trial of 20 men suspected of involvement in the attacks.
The French interior minister has warned the terrorist threat is especially high at times like the attack’s trial, which is due to start on Wednesday morning.
Around 1,000 police have been deployed for the trial, he said.
