Saint-Clair-sur-Epte (; literally 'Saint-Clair on Epte') is a commune in the Val-d'Oise department in Île-de-France in northern France. It is situated on the river Epte, 10 km southwest of Gisors.
The treaty of Saint-Clair-sur-Epte in 911 established Rollo, a Norse warlord and Viking leader, as the first Duke of Normandy.
Henry I of England seized the castle of Saint-Clair-sur-Epte in 1118.Ordericus Vitalis, The Ecclesiastical History, Book XII. (The Ecclesiastical History of Orderic Vitalis: Books XI, XII and XIII, Translated and edited by Marjorie Chibnall, Oxford University Press, 2002. )
See also Communes of the Val-d'Oise department
References
External links Official website
Association of Mayors of the Val d'Oise