 However, this story is not confirmed by local archaeologists researching Saint-Ouen-l'Aumône archives.The abbey's enclosure of land covered .To breathe life into the abbey, from 1237 until 1242 Blanche of Castile devoted herself to a chapter of the Cistercians, and in 1242 she installed, in barely-finished buildings, a group of nuns from Saint-Antoine near Paris.