848

By place

Europe

• Summer - Bordeaux, capital of Aquitaine, falls into the hands of Viking raiders. King Charles the Bald sends a Frankish fleet to lift the siege. Despite destroying some Viking longships on the Dordogne River, they fail to save the city. The Abbey of Saint-Pierre in Brantôme is sacked.
• Emperor Lothair I, and his brothers Louis the German and Charles the Bald, meet in Koblenz to continue the system of "con-fraternal government".
• Frankish forces under Count William of Septimania assume authority over the counties of Barcelona and Empúries.
• The Saracens conquer Ragusa, after its Byzantine garrison is forced by severe famine to surrender. The city and its castle are razed to the ground.

  Britain

• The armies of Brycheiniog and Gwent clash in the battle of Ffinnant. King Ithel of Gwent is killed in the fighting.
• Máel Sechnaill mac Maíl Ruanaid, High King of Mide, defeats a Norse Viking army at Sciath Nechtain in Ireland.

  Asia

• The Chola Dynasty in Southern India starts to rule.

  By topic

Religion

• Pope Leo IV builds the Leonine City, a fortified three-kilometre wall that encircles the Vatican Hill and Borgo, to defend Rome.
• The Roman Catholic church of Santa María del Naranco, on the slope of Monte Naranco, is completed.