Parc Cybi, Holyhead
Holy Island

Holy Island is a small island off the coast of Anglesey that is rich in archaeology.

Originally there were probably four chambered tombs, although remains of only two survive. There are standing stones, including the pair of tall stones at Penrhos Feilw, and many Iron Age settlements, some well-preserved, such as the Tŷ Mawr hut circles near South Stack. The summit of Holyhead Mountain is crowned with a large hillfort and a small Roman signal station. The Romans built a fort in what is now Holyhead and this was used in the early medieval period by a monastic community, then for the parish church.

In the early 19th century Holyhead became the main port for Ireland. The Stanleys lived at Penrhos House and W. O. Stanley investigated many of the antiquities of the island.