William the Conqueror came to England in 1066. After that he became the King of England.William the Conqueror should strictly be known as William I. William is credited with kick-starting England into the phase known as Medieval England; William was the victor at the Battle of Hastings; he introduced modern castle building techniques into Medieval England and by his death in 1087, he had financially tied down many people with the Domesday Book.
William was born in 1027 and he died in 1087. His father was Robert, Duke of Normandy and his mother was Herleve of Falaise. They never married and William was known as "William the Bastard" to his enemies - though this was never said to his face when he had grown up.William the Conqueror came to England in 1066. After that he became the King of England.