The Norman Conquest of England in 1066 led to major political, social, and cultural changes. King Edward the Confessor died without an heir, leading to claims on the English throne by Harold Godwinson, William Duke of Normandy, and Harald Hardrada of Norway. William defeated Harold at the Battle of Hastings in 1066, establishing Norman rule over England. This brought changes like replacing English elites with Normans, introducing feudalism as the governmental system, and making French the dominant language, though English and Latin were also used. Norman architecture like castles and churches were built in the new Romanesque style using stone.