William the Conqueror probably secured earlier. Papal sanction of the marriage appears to have required the founding of two monasteries in Caen – one by William and one by Matilda. The marriage was important in bolstering William's status, as Flanders was one of the more powerful French territories, with ties to the French royal house and to the German emperors. Contemporary writers considered the marriage, which produced four sons and five or six daughters, to be a success. No authentic portrait of William has been found; the contemporary depictions of him on the Bayeux Tapestry and on his seals and coins are conventional
William the Conqueror fitzOsbern in Herefordshire, which affected Edwin's power within his own earldom. The king marched through Edwin's lands and built a castle at Warwick. Edwin and Morcar submitted, but William continued on to York, building castles at York and Nottingham before returning south. On his southbound journey, the king began constructing castles at Lincoln, Huntingdon, and Cambridge. William placed supporters in charge of these new fortifications – among them William Peverel at Nottingham and Henry de Beaumont at Warwick. Then the king returned to Normandy late in 1068. Early in 1069, Edgar the Ætheling rose in revolt and attacked York. Although