Battles & Campaigns · 911
Treaty of Saint-Clair-sur-Epte
Saint-Clair-sur-Epte, Val-d'Oise, France
What happened
Viking raiders had attacked the Frankish lands for years. At Saint-Clair-sur-Epte, Charles gave Rollo land west of the Epte River, around Rouen. In return Rollo was to be baptised, become the king's vassal and guard the Seine against other Viking raids.
Why it matters
Why it matters: It changed how mainland Europe dealt with Viking raids. It is treated as the beginning of the Duchy of Normandy.
What came next
Rollo's successors expanded their lands. One of his descendants, William, became king of England in 1066 after the Battle of Hastings.
Did you know?
Rollo took the baptismal name Robert.
Timeline
- Autumn 911Agreement at Saint-Clair-sur-Epte (likely date).
- 923 CECharles III is deposed.
- 1066 CERollo's descendant William becomes king of England.