Æthelstan was crowned King of the Anglo-Saxons at Kingston upon Thames on 4 September 925. The ceremony formally established the authority of a king whose succession had been less straightforward than the coronation might suggest.

His father, Edward the Elder, had died in July 924. Æthelstan was accepted as king in Mercia, where he had strong connections. His younger half-brother Ælfweard appears to have had support in Wessex. Ælfweard died only weeks after their father, removing Æthelstan’s most immediate rival. However, Wessex did not automatically accept the new king.

Æthelstan’s coronation therefore came more than a year after Edward’s death. Kingston was a significant choice. The royal estate stood near the traditional boundary between Wessex and Mercia, the two areas Æthelstan needed to hold together. Athelm, Archbishop of Canterbury, crowned him.

The ceremony did not mark the completion of a unified England. Æthelstan still had to extend his authority into territories outside his control.

That changed in 927. Æthelstan took York, ending Viking rule there, and established his supremacy over a much larger territory. From this point, he could present himself as King of the English.

The coronation at Kingston was an important stage in that process, not its conclusion. In 925 Æthelstan secured the kingship inherited from his father. Two years later, the territory over which he claimed kingship had grown considerably.