This article is about the year 911 A.D.; for the emergency telephone number, see 9-1-1.; for 9/11, see September 11, 2001 attacks; for other uses, see 911 (disambiguation).

Events

• Autumn - Charles the Simple argees to the Treaty of St.-Claire-sur-Epte, ceding the lower Seine area to the Norse invaders under Hrolf Ganger,also known as Rollo of Normandy, who is considered the founder of the duchy of Normandy.
• Accession of Pope Anastasius III (911 - 913).
• The town of Drogheda in Ireland, is founded by the Danes.
• Prince Oleg of Novgorod raids Byzantine Empire and forces Leo VI the Wise to sign a trade agreement.

Deaths

• Wilfred II Borrel, count of Barcelona
• Louis the Child, last Carolingian ruler of the East Franks
• Pope Sergius III
• Earl Aethelred of Mercia, husband of Ethelfleda

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