 In 1941 the castle was given to the State by Sir Michael Duff . It is now maintained by Cadw and is protected as a Grade I listed building and as a scheduled monument . In the light of Welsh devolution and other political changes , the history of Dolbadarn Castle and similar Welsh castles has become increasing prominent . In response , Cadw have noted that they intend to give an increased priority to communicating the history of these castles and the Welsh princes . 
