William I can also be referred to as William the Conqueror or William the Bastard. He was the first Norman King of England, who reigned from 1066-1087. As a military commander, William was known for his courage and tactical prowess. He famously led the Norman invasion of England, which culminated in the Battle of Hastings and the defeat of King Harold II. William's reign saw the integration of Norman and Anglo-Saxon cultures, as well as the building of significant landmarks such as the Tower of London and the Norman Conquest. Overall, William I, or William the Conqueror, remains an iconic figure in English history.