Castle Rising Castle new wealth, William built Castle Rising and New Buckenham Castle in Norfolk, and expanded Arundel Castle in West Sussex. The castle was located from the port of King's Lynn. In the 12th century it would have typically have been reached by boat, through a channel in the marshy Babingley River that ran nearby. Following the Norman conquest of England, the land had been granted to Bishop Odo, the Earl of Kent, who may have used it as an administrative centre; there were many Saxo-Norman buildings on the site of the later castle. Although Norfolk was a prosperous region during this
Duke of Norfolk Edward I), Margaret, and then to her grandson, Thomas Mowbray. When Richard II made Thomas Mowbray the Duke of Norfolk in 1397, he conferred upon him the estates and titles (including Earl Marshal) that had belonged to the Earls of Norfolk. His elderly grandmother Margaret was still alive, and so at the same time she was created Duchess of Norfolk for life. Mowbray died in exile in 1399, some months after his grandmother, and his dukedom was repealed. His widow took the title of "Countess of Norfolk". Between 1401 and 1476, the Mowbray family held the title and estates of