In Easter 1230 William visited Llywelyn's court Garth Celyn, Aber Garth Celyn no...

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In Easter 1230 William visited Llywelyn's court Garth Celyn, Aber Garth Celyn now known as Pen y Bryn, Abergwyngregyn. During this visit he was found in Llywelyn's chamber together with Llywelyn's wife Joan. On 2 May, De Braose was hanged in the marshland under Garth Celyn, the place now remembered as Gwern y Grog, Hanging Marsh, a deliberately humiliating execution for a nobleman, and Joan was placed under house arrest for a year.

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