Year 801 (DCCCI) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. Events By place Europe Emperor Charlemagne formally cedes Nordalbian territory (modern-day Schleswig-Holstein) to the pagan Obotrites (allies of the Carolingian Empire). April 3 – King Louis the Pious, son of Charlemagne, captures Barcelona after a siege of several months. Bera is appointed first count of Barcelona. Britain King Eardwulf of Northumbria leads an army into Mercia against his rival, Coenwulf, in order to flush out other claimants to the Northumbrian throne. A synod appears to have been held at Chelsea, as an extant charter (Sawyer 158) records a confirmation of a land grant by Coenwulf, the king of Mercia that was part of the council's proceedings. By topic Religion Rabanus Maurus, Frankish Benedictine monk, takes his vows in the monastery of Fulda and receives ordination as a deacon. Births September 8 – Ansgar, Frankish monk and archbishop (d. 865) June 17 – Drogo of Metz, illegitimate son of Charlemagne Al-Kindi, Muslim philosopher and polymath (approximate date) Waldrada of Worms, Frankish Duchess, married to Conrad II Wang Chengyuan, general of the Tang Dynasty (d. 834) Deaths Heathoberht, Bishop of London Rabia Basri, Muslim Sufi mystic and saint (b. 717) References Sources