The roofs were thatched with bark, straw, reeds or rushes.
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.
The streets are lined with magnificent oaks, while many of the houses with heavy, thatched gables date from the 17th century.
The city is built on a low plain, is regularly laid out, and has many fine warehouses, public buildings and residences, but its greater part, however, consists of mud-walled cabins supported by bamboo (guadua) framework and thatched with rushes.