Llanfihangel Din Sylwy

A hillfort known as Din Sylwy or Bwrdd Arthur ('Arthur's Table') in north-east Anglesey, Wales, dating to the middle-to-late Iron Age (c. 800 BC onwards). At approximately 7.7 hectares, it is one of the largest hillforts on Anglesey, featuring defensive walls nearly 2.5 metres wide built from parallel limestone slabs. The site was later occupied during the Roman period by members of the Ordovices tribe, with finds including coins, brooches, pottery, and iron chains. Two entrances have been identified to the south and west. The adjacent parish church of St. Michael dates to the fifteenth century.