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
Stephen, King of England remains a popular subject for historical study: David Crouch suggests that after King John he is "arguably the most written-about medieval king of England". Modern historians vary in their assessments of Stephen as a king. Historian R. H. Davis's influential biography paints a picture of a weak king: a capable military leader in the field, full of activity and pleasant, but "beneath the surface ... mistrustful and sly", with poor strategic judgement that ultimately undermined his reign. Stephen's lack of sound policy judgement and his mishandling of international affairs, leading to the loss of Normandy and his consequent inability to