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 his nephew William of York to the post in 1144 only to find that, when Pope Innocent II died in 1145, Bernard was able to get the appointment rejected by Rome. Bernard then convinced Pope Eugene III to overturn Henry's decision altogether in 1147, deposing William, and appointing Henry Murdac as archbishop instead. Stephen was furious over what he saw as potentially precedent-setting papal interference in his royal authority, and initially refused to allow Murdac into England. When Theobald, the Archbishop of Canterbury, went to consult with the Pope on the matter against Stephen's wishes, the King refused to allow