Berkeley Castle is a castle in the town of Berkeley, Gloucestershire, England. The castle's origins date back to the 11th century, being designated by English Heritage as a Grade I-listed building. The castle, traditionally believed to have been the scene of the murder of King Edward II in 1327, has remained in the possession of the Berkeley family sinc…Berkeley Castle is a castle in the town of Berkeley, Gloucestershire, England. The castle's origins date back to the 11th century, being designated by English Heritage as a Grade I-listed building. The castle, traditionally believed to have been the scene of the murder of King Edward II in 1327, has remained in the possession of the Berkeley family since they reconstructed it in the 12th century, except for a period of royal ownership under the Tudors.