Edward the Confessor dies childless, sparking a succession crisis that will eventually lead to the Norman conquest of England.

The Norman Conquest (or the Conquest) was the 11th-century invasion and occupation of England by an army made up of thousands of Normans, Bretons, Flemish, and French troops, all led by the Duke of Normandy, later styled William the Conqueror.

William's claim to the English throne derived from his familial relationship with the childless Anglo-Saxon king Edward the Confessor, who may have encouraged William's hopes for the throne. Edward died in January 1066 and was succeeded by his brother-in-law Harold Godwinson. The Norwegian king Harald Hardrada invaded northern England in September 1066 and was victorious at the Battle of Fulford on 20 September, but Godwinson's army defeated and killed Hardrada at the Battle of Stamford Bridge on 25 September. Three days later on 28 September, William's invasion force of thousands of men and hundreds of ships landed at Pevensey in Sussex in southern England. Harold marched south to oppose him, leaving a significant portion of his army in the north. Harold's army confronted William's invaders on 14 October at the Battle of Hastings. William's force defeated Harold, who was killed in the engagement, and William became king.

Although William's main rivals were gone, he still faced rebellions over the following years and was not secure on the English throne until after 1072. The lands of the resisting English elite were confiscated; some of the elite fled into exile. To control his new kingdom, William granted lands to his followers and built castles commanding military strongpoints throughout the land. The Domesday Book, a manuscript record of the "Great Survey" of much of England and parts of Wales, was completed by 1086. Other effects of the conquest included the court and government, the introduction of the Norman language as the language of the elites, and changes in the composition of the upper classes, as William enfeoffed lands to be held directly from the king. More gradual changes affected the agricultural classes and village life: the main change appears to have been the formal elimination of slavery, which may or may not have been linked to the invasion. There was little alteration in the structure of government, as the new Norman administrators took over many of the forms of Anglo-Saxon government.

Edward the Confessor (Old English: Ēadƿeard Andettere [ˈæːɑdwæɑrˠd ˈɑndettere]; Latin: Eduardus Confessor [ɛduˈardus kõːˈfɛssɔr], Ecclesiastical Latin: [eduˈardus konˈfessor]; c. 1003 – 5 January 1066) was one of the last Anglo-Saxon English kings. Usually considered the last king of the House of Wessex, he ruled from 1042 to 1066.

Edward was the son of Æthelred the Unready and Emma of Normandy. He succeeded Cnut the Great's son – and his own half-brother – Harthacnut. He restored the rule of the House of Wessex after the period of Danish rule since Cnut conquered England in 1016. When Edward died in 1066, he was succeeded by his wife's brother Harold Godwinson, who was defeated and killed in the same year by the Normans under William the Conqueror at the Battle of Hastings. Edward's young great-nephew Edgar the Ætheling of the House of Wessex was proclaimed king after the Battle of Hastings in 1066 but was never crowned and was peacefully deposed after about eight weeks.

Historians disagree about Edward's fairly long 24-year reign. His nickname reflects the traditional image of him as unworldly and pious. Confessor reflects his reputation as a saint who did not suffer martyrdom as opposed to his uncle, King Edward the Martyr. Some portray Edward the Confessor's reign as leading to the disintegration of royal power in England and the advance in power of the House of Godwin, because of the infighting that began after his death with no heirs to the throne. Biographers Frank Barlow and Peter Rex, on the other hand, portray Edward as a successful king, one who was energetic, resourceful and sometimes ruthless; they argue that the Norman conquest shortly after his death tarnished his image. However, Richard Mortimer argues that the return of the Godwins from exile in 1052 "meant the effective end of his exercise of power", citing Edward's reduced activity as implying "a withdrawal from affairs".About a century later, in 1161, Pope Alexander III canonised the king. Edward was one of England's national saints until King Edward III adopted George of Lydda as the national patron saint in about 1350. Saint Edward's feast day is 13 October, celebrated by both the Church of England and the Catholic Church.