Stephen (c. 1092/6 – 25 October 1154), often referred to as Stephen of Blois, was a grandson of William the Conqueror. He was King of England from 1135 to his death, and also the Count of Boulogne in right of his wife. Stephen's reign was marked by the Anarchy, a civil war with his cousin and rival, the Empress Matilda. He was succeeded by Matilda's son, Henry II, the first of the Angevin kings.