Landmark 78, Kidwelly Castle, Carmarthenshire Kidwelly is a mighty and imposing monument of Norman power. It is also a beautiful example of castle development, as the castle was dramatically altered on a number of occasions to conform to the latest thinking in military science. Roger, bishop of Salisbury, the justiciar of England, established Norman power in the area and the ringwork castle (shown below) that he built here was one of a series of strongholds designed by the Normans to secure the new conquests of south Wales by commanding the river passes here and at Laugharne, Llansteffan and Loughor