The Vexin is a former region in France, divided since the 10th century between the Norman Vexin (Vexin normand) and the French Vexin (Vexin français). As a means of recording the passage of time, the 10th century was that century which lasted from 901 to 1000. ...

The Gaulish tribe of the Veliocassi, whose capital was at Rouen, gave their name to the region that became known as the Vexin, later to become a county. The Norman incursions under Rollo of Normandy were halted by the Treaty of Saint-Clair-sur-Epte in 911 which established the Duchy of Normandy and fixed its boundary with the territory of the Kingdom of France along the river Epte. This divided the county of Vexin into two parts: A map of Gaul showing the relative position of the tribes. ... Rouen Cathedral The entrance to Rouen Cathedral Abbey church of Saint-Ouen, (chevet) in Rouen Rouen, medieval house Rouen (pronounced in French, sometimes also ) is the historical capital city of Normandy, in northwestern France on the River Seine, and presently the capital of the Haute-Normandie (Upper Normandy) région. ... The Normans (adapted from the name Northmen or Norsemen) were a mixture of the indigenous population of Neustria and Danish or Norwegian Vikings who began to occupy the northern area of France now known as Normandy in the latter half of the 9th century. ... Rollo on the Six Dukes statue in the Falaise town square. ... The Treaty of Saint-Clair-sur-Epte was signed in the autumn of 911 between Charles the Simple and Rollo, the leader of the Vikings, for the purpose of settling the Normans in Neustria and to protect Charles kingdom from any new invasion from the northmen. No written records survive... Events Autumn - Charles the Simple argees to the Treaty of St. ... The Duchy of Normandy stems from the Viking invasions of France in the 8th century. ... Monets Water Lily Pond, painted 1899, was created by diverting a branch of the Epte The Epte is a 100 km long river in Seine-Maritime in Normandy. ...

• the Norman Vexin, which became part of the Duchy of Normandy and is now part of the French région of Haute-Normandie. It is bounded by the rivers Epte, Andelle and Seine.

• the French Vexin remained part of the Île-de-France. It straddles the current départements of Val-d'Oise and Yvelines and is bounded by the rivers Epte, Oise and Seine. A regional nature park was established in the French Vexin in 1995.