Dolforwyn Castle was one of the last strongholds built by Llywelyn ap Gruffudd (known as Llywelyn the Last), the last native Prince of Wales to be formally recognized by the crown, and stands as a weathered reminder of the defiance of the Welsh princes in the face of the conquest of the English king, Edward I. Llywelyn began work on the castle in 1273 to cement his position of power in the Severn Valley. Before he’d even completed it, however, the prince received a message from the English king telling…