Cadbury Castle, Somerset is the largest amongst forts reoccupied following the end of Roman rule, to defend against pirate raids, and the Anglo-Saxon invasions. The cemetery outside Poundbury Hill contains east-facing Christian burials of the 4th century CE. In Wales, the hillfort at Dinas Powys was a late Iron Age hillfort reoccupied from the 5th-6th centuries CE;[17] similarly at Castell Dinas Brân a hillfort of c.600 BCE was reused in the Middle Ages, with a stone castle built there in the 13th century CE.[18]