At the Château de Grignon, 195 migrants from Mayotte find temporary refuge. They were housed on this 17th century site before being distributed to provincial centers.
In turn, there was talk that the superb castle of Thiverval-Grignon would house the PSG training center or, after division, housing. After the abandonment of these projects, the castle is today dedicated to another and singular destiny: to make emergency reception. The gates only open to bring in the social services and associations to welcome them.