Gwilym ap Tudur Rhys and Owain Glyndŵr. As a result, the Tudur brothers began planning an attack on Conway Castle. On Good Friday, 1 April 1401, the brothers and 44 men (which included those who had also been excluded from the pardons) infiltrated the castle. They had pretended to be carpenters, and captured the castle while the guard were in church. Negotiations began for the return of the castle on 13 April, with the king represented by Henry "Hotspur" Percy and Gwilym representing the Welsh forces. After seeking a compromise, which would have resulted in pardons being given to the Welshmen, the king
Aberystwyth Castle Cadwaladr's later attempt to murder Anarawd ap Gruffydd, the new king of Deheubarth, resulted in Owain Gwynedd sending his son Hywel ab Owain Gwynedd to burn it in 1143. The castle was rebuilt and later reinforced with stone. After a succession of at least three owners, it was taken by Welsh prince Llywelyn the Great in 1221. Llywelyn razed the castle and erected a new one in its place. The current castle was rebuilt in its current location by Edward I of England in 1277 after the end of the first war against Llywelyn ap Gruffydd Llywelyn the Great's grandson.