Castell Dinas

Castell Dinas is a hillfort and castle in southern Powys, Wales [1]. At 450 m it has the highest castle in England and Wales [1]. It is positioned to defend the Rhiangoll pass between Talgarth and Crickhowell [1]. A fortified Norman castle with stone walls was built on the site possibly by William Fitz Osbern or his son Roger de Breteuil, Earl of Hereford in the period 1070 to 1075 [1]. The fortress seems to have been constructed in stone from the first with a hall-keep surrounded with curtain walls and square towers [1].