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
Gweirca ferch Owain part of two animals with their heads back to back and their tails interlacing elaborately with two circles. The lower part of the panel has interlacing stems." The inscription in Latin reads: Translated as: P. Lord states that Gweirca's grave slab is "the earliest dated Welsh memorial of any kind" Gweirca ferch Owain Gweirca ferch Owain (possibly Gwerica) was a medieval Welsh noblewoman, granddaughter of Madog ap Gruffydd Maelor and daughter of Owain ap Gruffydd ap Madog. Gweirca died in 1290 and is buried at Valle Crucis Abbey, near Llangollen, which was founded by her grandfather. Her sepulchral grave slab