Criccieth Castle a distant relation of Llywelyn ap Gruffudd, began an uprising against English rule that spread quickly through Wales. Several English-held towns were razed and Criccieth (along with Harlech Castle and Aberystwyth Castle) were besieged that winter. Its residents survived until spring when the castle was resupplied. In the 14th century the castle had a notable Welsh constable called Hywel ap Gruffydd, known as Howell the Axe, who fought for Edward III at the Battle of Poitiers in 1356. The castle was used as a prison until 1404 when Welsh forces captured the castle during the rebellion of Owain Glyndŵr. The
Hywel ab Owain Gwynedd of Chester. In 1146, news reached Prince Owain ap Cynan of Gwynedd that his favoured eldest son and heir, the "edling", Rhun, died. Owain was overcome with grief, falling into a deep melancholy from which none could console him, until news reached him that Mold castle in Tegeingl (Flintshire) had fallen to Gwynedd, "[reminding Owain] that he had still a country for which to live," wrote historian Sir John Edward Lloyd. As the eldest surviving son and "Edling", Hywel succeeded his father in 1170 as Prince of Gwynedd in accordance with Welsh law and custom. However, the new prince was