Archaeological sites in Anglesey

Archaeological Sites of Anglesey

Anglesey’s landscape preserves over five millennia of history, from the Neolithic burial chambers of Barclodiad y Gawres and Bodowyr to the industrial scale of the Parys Mountain copper mines. This collection features Iron Age hillforts like Bwrdd Arthur, the medieval ruins of Penmon Priory, and the 11th-century motte and bailey of Castell Aberlleiniog. These landmarks provide a direct look at the island's evolution through its prehistoric standing stones, Roman fortifications, and early Christian settlements.

Archaeological Sites of Anglesey — Map

Robin Drayton / CC BY-SA 2.0

A

Parys Mountain Copper Mines

These copper mines have been used since the Bronze Age, reaching the peak of their popularity in 18th century. An industrial gem.

B

Penmon Priory

A 12th-century Augustinian priory featuring a Norman church and the remains of a 13th-century refectory. The site includes a 16th-century dovecote and St Seiriol’s Holy Well.

C

Castell Aberlleiniog

Castell Aberlleiniog is a motte and bailey fortress near the Welsh village of Llangoed on the Isle of Anglesey, built between 1080 and 1099…

D

Castell Bryn Gwyn

Castell Bryn Gwyn is a prehistoric site on the Isle of Anglesey, west of Brynsiencyn.

E

Capel Lligwy ruined chapel

Capel Lligwy is a ruined chapel near Rhos Lligwy in Anglesey, north Wales, dating back to the first half of the 12th century.

F

Barclodiad y Gawres

A Neolithic cruciform passage grave notable for its rare examples of prehistoric megalithic art, including stones carved with zig-zags, lozenges, and spirals.

G

Appoximate site of Cemlyn Roman Fortlet

The site of a suspected Roman fortlet positioned to monitor the northern coast of Anglesey near Cemlyn Bay.

H

Llys Rhosyr

The excavated remains of a 13th-century royal court belonging to the Princes of Gwynedd, including the foundations of a Great Hall and surrounding defensive walls.

I

St Dwynwen's Church (ruined)

The 16th-century ruins of a church dedicated to St Dwynwen, the Welsh patron saint of lovers, located on the tidal island of Ynys Llanddwyn.

J

Bryn Gwyn Standing Stones

The Bryn Gwyn stones stand about 280 metres to the south-west of Castell Bryn Gwyn, on the low ridge some 2 m above the valley of the Afon…

K

Old Llanwenllwyfo Church

The Old Church of St Gwenllwyfo, Llanwenllwyfo is a medieval ruined church near Dulas, in Anglesey, Wales, perhaps built in the 15th…

L

Bwrdd Arthur Hillfort

A large Iron Age hillfort situated on a flat-topped limestone plateau, featuring a defensive drystone rampart and evidence of internal prehistoric hut circles.

M

Bodowyr Burial Chamber

A Neolithic portal dolmen consisting of a mushroom-shaped capstone supported by three upright stones, representing the remains of a prehistoric burial chamber.

N

Cytiau'r Gwyddelod

A group of well-preserved Iron Age and Romano-British stone-built roundhouses and enclosures situated near the foot of Holyhead Mountain.

O

Tregwehelydd Standing Stone

A solitary Bronze Age standing stone reaching approximately 2.5 meters in height, located in open farmland near Llanddeusant.

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