The Norman rule refers to the period of governance in England following the Norman Conquest of 1066, when William the Conqueror, the Duke of Normandy, defeated King Harold II at the Battle of Hastings. This event marked the beginning of Norman control over England, leading to significant changes in the country's social, political, and cultural landscape. Under the Norman rule, the feudal system was established, redistributing land to Norman nobles and creating a hierarchy of lords and vassals. This system strengthened the monarchy and centralized power, while also introducing the Norman language and architectural styles, such as the construction of castles and cathedrals across England.