House of Blois chose a wife from the House of Champagne (Adela of Champagne) as a counterpoise to Angevin power. The senior line of the House of Blois became extinct with the death of Joan I of Navarre, wife of Philip IV of France, in 1305. Champagne and Navarre passed to the Capetian dynasty. King Stephen I of England, 1135–1154, was both a member of the House of Blois and the last Anglo-Norman King, being the grandson of William the Conqueror through his daughter Adela of Normandy. A branch of the family was established in Sancerre by Stephen I of Sancerre, a younger
England and King David I of 1135 had resulted in a significantly expanded kingdom. David, moreover, was no longer in practice a sub-king. So if King Henry's life and reign had brought David all his fortune, Henry's death had brought David even more. The settlement with Stephen was not set to last long. The arrival in England of the Empress Matilda, claimant to the English throne, gave David an opportunity to renew the conflict with Stephen. When Stephen was captured by the Matilda's forces on 2 February 1141, David finally decided to disregard his agreement with Stephen and seek the support of Matilda. In either