829Centuries: 8th century - 9th century - 10th century
- Egbert of Wessex conquers Mercia and is recognized as Bretwalda.
- Ansgar is appointed missionary to Sweden by Louis the Pious
- Theophilus II succeeds Michael II as emperor of Byzantium.
- The Saracens ravage the coast of Dalmatia.
- Oldest known mention of the city of Wiesbaden (approximate date)
- Saint Nicephorus, patriarch of Byzantium\n