|Covid-19|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 (half) brothers Louis the German and Charles the Bald, meet in Koblenz to continue the system of "con-fraternal government".
Frankish forces under Count (comté) William of Septimania assume authority over the counties of Barcelona and Empúries (modern Spain).
The Saracens conquer Ragusa (Sicily), after its Byzantine garrison is forced by severe famine to surrender. The city and its castle are razed to the ground.
The armies of Brycheiniog and Gwent clash in the battle of Ffinnant (Wales). King Ithel of Gwent is killed in the fighting (approximate date).
Máel Sechnaill mac Maíl Ruanaid, High King of Mide, defeats a Norse Viking army at Sciath Nechtain in Ireland (approximate date).
The Chola Dynasty in Southern India starts to rule (approximate date).
Pope Leo IV builds (on the opposite of the Tiber River) 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 (Northern Spain), is completed.
Alfonso III, king of Asturias (approximate date)
Carloman, Frankish abbot (d. 877)
Charles the Child, king of Aquitaine (or 847)
Lothair the Lame, Frankish abbot (d. 865)
Onneca Fortúnez, Basque princess (or 850)
Ali ibn Muhammad, Muslim sultan (b. 827)
Cui Yuanshi, chancellor of the Tang Dynasty
Drest X, king of the Picts
Guo, empress dowager of the Tang Dynasty
Ithel, king of Gwent (approximate date)
Li Gongzuo, Chinese writer
Malik ibn Kaydar, Muslim governor
Rechtabhra, bishop of Clonfert
Shi Xiong, Chinese general
Sunifred, Frankish nobleman
Sunyer I, Frankish nobleman
William I, duke of Gascony
Yahya al-Laithi, Muslim scholar
Year 848 (DCCCXLVIII) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar.