Editing Koblenz (section)

===Middle Ages===
With the fall of the [[Western Roman Empire]], the city was conquered by the Franks and became a royal seat.{{citation needed|date=August 2023}} After the division of [[Charlemagne]]'s empire, it was included in the lands of his son [[Louis the Pious]] (814). In 837, it was assigned to [[Charles the Bald]], and a few years later it was here that Carolingian heirs discussed what was to become the [[Treaty of Verdun]] (843), by which the city became part of [[Lotharingia]] under [[Lothair I]].{{citation needed|date=August 2023}} In 860 and 922, Koblenz was the scene of ecclesiastical synods. At the first synod, held in the Liebfrauenkirche, the reconciliation of [[Louis the German]] with his half-brother Charles the Bald took place.{{sfn|Chisholm|1911|p=612}} In the second, slavery was condemned, specifically it was decreed that any man that 'led away a Christian man and then sold him' should be considered guilty of homicide.{{citation needed|date=August 2023}} The city was sacked and destroyed by the [[Norsemen]] in 882. In 925, it became part of the eastern German Kingdom, later the [[Holy Roman Empire]].{{citation needed|date=August 2023}}

In 1018, the city was given by the emperor [[Henry II, Holy Roman Emperor|Henry II]] to the [[archbishop-elector of Trier]] after receiving a charter. It remained in the possession of his successors until the end of the 18th century,{{sfn|Chisholm|1911|p=612}} having been their main residence since the 17th century.{{citation needed|date=August 2023}} Emperor [[Conrad II, Holy Roman Emperor|Conrad II]] was elected here in 1138. In 1198, the battle between [[Philip of Swabia]] and [[Otto IV, Holy Roman Emperor|Otto IV]] took place nearby. In 1216, prince-bishop [[Theoderich von Wied]] donated part of the lands of the basilica and the hospital to the [[Teutonic Knights]], which later became the ''Deutsches Eck''.{{citation needed|date=August 2023}}

In 1249–1254, Koblenz was given new walls by Archbishop [[Arnold II of Isenburg]]; and it was partly to overawe the turbulent citizens that successive archbishops built and strengthened the fortress of Ehrenbreitstein that still dominates the city.{{sfn|Chisholm|1911|p=612}}