Din Lligwy was a fortified settlement, dated to the 3rd-4th centuries AD. Despite the finds mainly from the Roman period, the beginnings of settlement in this area could reach the Iron Age. Probably there was then a small farming community.
A small settlement was founded on a plan of a pentagon, about 50 meters long on the east-west line. The wall, 1 meter wide and up to 2 meters high, was built of stones not connected with mortar. The buildings placed in the courtyard had various shapes. There were two free-standing, round huts with a diameter of 6.5-7.3 meters and up to seven rectangular buildings. The largest of them were 14.7 by 5.7 meters. All but one of them was placed next to the inner wall of the settlement. Only a single rectangular building was leaning on the south-western, outer wall, next to the original entrance, which was a simple gate in the wall. The circular constructions were probably residential houses, and rectangular were barns or workshops. Around the settlement were further houses in the north, south and west, where they stretched for a distance of 82 meters.
The foundations of buildings erected from local limestone have survived to this day. The peripheral defensive wall is also in good condition, although it is much smaller than its original height. The site is under the protection of the Cadw government agency, which makes it available to visitors.
Website anglesey-history.co.uk, The three ages of Lligwy.
Website coflein.gov.uk, Din Lligwy settlement, Moelfre.