The walls which enclose an area of about 50 acres are very impressive despite being nearly two thousand years old. In places they are 8 metres high and 4 metres thick. Constructed of limestone and sandstone with pebble fillings and held together by an extremely durable cement, the perimeter wall encloses an area measuring 500 metres from east to west and 400 metres from north to south. Within this parallelogram were seven streets, three from east to west and these were cut at right angles by four streets running north to south.


The town was divided into twenty blocks and the many buildings included a market place, a basilica (town hall), large public bath, shops, inns, houses and an amphitheatre. The south-west portion of the town formed the main residential quarter. One very elaborate house discovered there must have had as many as ninety rooms and was adorned with sculptured colonnades, mosaic floors and frescoed walls.


The forum was the official centre of public and corporate life and occupied a central position in the heart of the town. It was also the market place and three of its sides were lined with shops. The basilica on the north side of the forum was the seat of the administrative body - the ‘Ordo Civitatis Silurum’ - the governing body of the City of the Silures.