Bernard of Clairvaux
Two important monasteries were founded in the department: one at Clairvaux in 1114, created by Bernard of Clairvaux, the other was the Abbey of the Paraclete near Nogent-sur-Seine, by his illustrious rival, Pierre Abélard and of which Héloïse d'Argenteuil was the first abbess. Bernard of Clairvaux was noted for his eloquence at the Council of Troyes and his preaching of the Second Crusade which had no result and whose outcome was disastrous.