In this period of anarchy the native princes of Glamorgan had their principal demesne, not at the camp but a mile to the north at Llystalybont, now merely a thatched farmhouse, while some Saxon invaders threw up within the camp a large moated mound on which the Normans about the beginning of the 12th century built the great shellkeep which is practically all that remains of their original castle.
Their houses, regularly ranged in streets, are built of adobes thatched with coarse grass.
They are enlarged replicas of the primeval wooden hut described above, having rafters with their upper ends crossed; thatched or shingled roof; boarded floors, and logs laid on the roof-ridge at right angles for the purpose of binding the ridge and the rafters firmly together.
The streets are lined with magnificent oaks, while many of the houses with heavy, thatched gables date from the 17th century.
A thatched roof is imperative in the orthodox shrine, but in modern days tiles or sheets of copper are sometimes substituted.