Although 16 people face charges, nine of them will be absent at the trial. They are two Belgian, five French and one Dutch jihadi and a Moroccan man.
Three of those on trial are accused of planning attacks in Belgium. There are currently on remand. One of the three will also be tried for the attempted murders of police officers.
The three are, along with an Algerian national arrested in Greece, considered by the Federal Judicial Authorities to be the leaders of the terrorist cell. The 12 others are accused of being members of a terrorist group.
The court will sit all day on Monday 9, Tuesday 10, Thursday 12 May and in the morning of Friday 13 May.
The first week of the trial will be taken up with the cross examination of the accused. The second and third week of the three-week trial will be taken up with evidence from the Federal Judicial authorities and testimony from the defence.