Llys Rhosyr is a significant site not least because it is the only Royal Court of the Princes of Gwynedd of which the ground plan remains virually intact. Those elsewhere were despoiled at the conquest, or destroyed in the last century.
Llys Rhosyr was a stronghold of Welsh rule in the 13th century. In Anglesey's southwest corner, it is the only medieval court of a Welsh king that you can actually visit, anywhere in Wales and it’s still possible to see the layout of this court of the Princes of Gwynedd, as the ground plan is virtually intact.
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Newborough Heritage Trust - Llys Rhosyr
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