Taken by Glyndŵr’s forces in 1404.

Directions: 5 miles north-east of Menai Bridge on the A545.

Coordinates: (53.2648, -4.0897)
What3words: marmalade.reviewed.sticking      

Nearby:

Llanfaes Friary - a Welsh monastery destroyed by Henry IV in 1400.

Coordinates: (53.2751, -4.0872)

Penmynydd - the ancestral home of Glyndŵr’s cousins, the Tudurs of Anglesey.

Coordinates: (53.2524, -4.2559)