The Epte is a river in Seine-Maritime and Eure, in Normandy, France. It is a tributary of the Seine.The river rises in Seine-Maritime in the Pays de Bray, near Forges-les-Eaux. The river empties into the Seine not far from Giverny.In 911 the Treaty of Saint-Clair-sur-Epte established the river as the historical boundary of Normandy and Île-de-France.Claude Monet lived at Giverny near the river for more than forty years.