854

By place

Europe

• Emperor Lothair I meets his brothers in Attigny, Ardennes for the third time, to continue the system of "con-fraternal government".
• The Viking chieftains Rorik and Godfrid Haraldsson return to Denmark, to gain power after the death of King Horik I. During a civil war, they are forced to go back to Friesland.
• The German city of Ulm is first mentioned in a document by Louis the German.

  Britain

• King Æthelwulf of Wessex sends his two youngest sons, Alfred and Æthelred, on a pilgrimage to Rome.
• King Æthelweard of East Anglia dies, and is succeeded by his 14-year-old son Edmund.
• King Cyngen of Powys makes the first pilgrimage to Rome of a Welsh ruler.
• Viking chieftain Ubba winters in Milford Haven with 23 ships.

  By topic

Religion

• Eardulf becomes bishop of Lindisfarne, after the death of Eanbert.