The trial of Noor Salman will begin in March and last approximately five weeks, a judge says.

An Orlando federal judge made clear Thursday that the widow of the Pulse nightclub gunman will be the centerpiece of a trial that will be big, will last an estimated five weeks and will involve hundreds of people.

Noor Salman, 30, is the widow of gunman Omar Mateen, who killed 49 people and left at least 68 wounded when he opened fire inside Pulse, a gay nightclub, June 12.

She’s charged with aiding and abetting and obstruction of justice.

She has entered a plea of not guilty.

At an hour-long hearing Thursday, U.S. District Judge Paul Byron said he would begin picking a jury March 1, 2018.

Long before then — on Sept. 1 — the federal clerk of courts will send out 800 to 1,000 jury summonses, and each will include a questionnaire that will be 20 to 25 pages long, he said.

It will include questions about recipients’ backgrounds and about what they knows about the massacre, the most deadly U.S. mass shooting in modern history.

The judge asked attorneys for both sides to submit proposed questions by July 3.

He and attorneys will then comb through their responses to pare down the number of potential jurors who must report for jury selection March 1, he said.

“We’re going to have deadlines that stick,” Byron said.

Those who end up serving on the panel will have their names kept secret, he said, and during public sessions will be referred to only by numbers.

The trial, he estimated, would last five weeks.

The amount of evidence collected by government investigators is enormous, said Assistant U.S. Attorney Sara Sweeney. It involved more than 100,000 pages plus “many, many hours of video” and items seized as the result of 12 search warrants, she said.

Attorneys did not disclose any evidence Thursday, but defense attorney Charles Swift said he would ask Byron to suppress some of it.

He will allege that investigators violated Salman’s right to remain silent or to have an attorney present when she was questioned by law enforcement officers and her right against unreasonable searches.

Swift also hinted that he may ask Byron to move the trial out of Orlando because of pretrial publicity.

Byron overruled a U.S. magistrate in Oakland, Calif., insisting that she should be held without bond.

Also Thursday, Byron signed an order prohibiting the public release of evidence that the government and defense attorneys collect.

Salman said nothing during the hearing. Before it started she smiled and hugged one of her defense attorneys.