Vortigern’s Fortress
At the beginning of the 5th century the Roman Empire started to collapse and the legions were called back from Britain. The vacuum of power was taken up by a king called Vortigern, but he was pressed on all sides by the Picts and the Scotti who saw the loss of the legions as an opportunity to advance over the borders that the Romans had steadfastly guarded.
In desperation Vortigern hired Saxon mercenaries to supplement his own armies, but before long the Saxons began to seize British land for their own and resisted all attempts to send them back to their own lands.
Vortigern called together his advisors and between them they devised a plan to retreat westward into the mountains of Snowdonia and there to build a mighty fortress at Dinas Emrys from which to consolidate his power.