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 seal from after 1066, of which six impressions still survive, was made for him after he conquered England and stressed his role as king, while separately mentioning his role as Duke. When in Normandy, William acknowledged that he owed fealty to the French king, but in England no such acknowledgment was made – further evidence that the various parts of William's lands were considered separate. The administrative machinery of Normandy, England, and Maine continued to exist separate from the other lands, with each one retaining its own forms. For example, England continued the use of writs, which were not known