Fleury-Mérogis is notorious as a leading center of Islamist radicalization in European prisons.

[3][4][5] Built between 1964 and 1968, the 180 hectare complex of Fleury-Mérogis comprises four entities: The main prison is formed by a polygonal central building from which radiate five blocks, each one consisting of three wings with four levels of cells.

In June 1981, a prison revolt occurred within the Corsican population of Fleury-Mérogis, who had been staying there due to their connections with the ongoing guerrilla conflict in Corsica.

They demanded the release of Alain Orsoni, a leader of the National Liberation Front of Corsica in Paris, and Serge Cacciari, a key participant in the Aleria standoff accused of the shooting of a gendarme.

[6] There is wire surrounding the top of the building, preventing helicopter and other possible escapes.