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 to Normandy, if that was needed. William then marched to Southwark, across the Thames from London, which he reached in late November. Next he led his forces around the south and west of London, burning along the way. He finally crossed the Thames at Wallingford in early December. Stigand submitted to William there, and when the duke moved on to Berkhamsted soon afterwards, Edgar the Ætheling, Morcar, Edwin, and Ealdred also submitted. William then sent forces into London to construct a castle; he was crowned at Westminster Abbey on Christmas Day 1066. William remained in England after his coronation and