It existed from 1131 to 1793, being founded by monks from the abbey of Clairvaux, at the behest of Jocelin of Soissons. There is now a hotel on the site, located in the old Cistercian inn. The roofless abbey church can be visited, along with the better-preserved buildings around the cloister. The original buildings suffered war damage in 1918.
- Poquet, Monographie de l'abbaye de Longpont (Paris: 1869)
- CATHOLIC ENCYCLOPEDIA: Abbey of Clairvaux
- Picardie 14-18 ::. Vestiges de l'abbaye de Longpont
- Catholic Encyclopedia: Soissons