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
Owain Glyndŵr's Parliament House, Machynlleth Glyndŵr Institute. In the centre of the town. Set into a continuous row of frontages midway along Heol Maengwyn, opposite the entrance to Plas Machynlleth and to the left of the Owain Glyndwr Institute. In about 1813 the artist Edward Pugh visited Machynlleth and in 1816 he published a fine coloured lithograph of Parliament House. He provides the following description of the building "Owen Glyndwr held his parliament here: and the house is still in being in which he and his adherents assembled. Its exterior appearance is barn like, and it is now used as a granary, etc, with the