Rollo, a Norwegian, who became the chief of a band of Norse pirates who one day sailed up the Seine to Rouen and took it, and so ravaged the country that Charles the Simple was glad to come to terms with them by surrendering to them part of Neustria, which thereafter bore from them the name of Normandy; after this Rollo embraced Christianity, was baptized by the Bishop of Rouen, and was the first Duke of Normandy (860-932).