741250 The Treaty of Saint Clair-sur-Epte between Charles III The Simple (879-929) King of France (898-923) and Rollo the Viking in 911 (litho) by French School, (19th century); Private Collection; (add.info.: Treaty gave Normandy to Rollo; Rollo Rognvaldsson (c.846-931) Norse Viking chieftain and 1st Duke of Normandy; also known as Rollon or Hrolf the Ganger;); French, out of copyright.