Edmund I was a tenth-century monarch who ruled the English from 939 until his death in 946. A member of the House of Wessex and the grandson of Alfred the Great, he ascended to the throne following the death of his half-brother, Æthelstan. His reign was characterized by efforts to reclaim territories from Viking control, including the Five Boroughs and York. He was eventually killed during a confrontation with an outlaw in Pucklechurch. Recognized as a saint, he is commemorated in the Anglican, Catholic, and Orthodox traditions.