Hugh Bigod, 1st Earl of Norfolk Hugh became Constable of Norwich Castle in 1122. Hugh initially supported Stephen of Blois as king of England. On the death of Henry I in 1135, his nephew Stephen usurped the throne, despite the oath Stephen and the barons had sworn to accept Henry's daughter Empress Matilda as his successor. It was Bigod who asserted that, in his last days, Henry I had named Stephen to become king at the expense of his daughter Matilda. Civil war resulted when, in 1139 Matilda, commanded the military strength necessary to challenge Stephen within his own realm. King Stephen had the initial support
Henry I of England December. The Empress Matilda did not give up her claim to England and Normandy, leading to the prolonged civil war known as the Anarchy between 1135 and 1153. Historians have drawn on a range of sources on Henry, including the accounts of chroniclers; other documentary evidence, including early pipe rolls; and surviving buildings and architecture. The three main chroniclers to describe the events of Henry's life were William of Malmesbury, Orderic Vitalis, and Henry of Huntingdon, but each incorporated extensive social and moral commentary into their accounts and borrowed a range of literary devices and stereotypical events from other popular