The carpenter admitted a group of Welsh rebels who proclaimed their allegiance to Owain Glyndwr ( 1355 - 1415) a great Welsh revolutionary leader. In 1400 Owain Glyndwr declared himself Prince Of Wales and embarks on rebellion against the occupation of Wales by England. The revolution was successful and by 1403 the Welsh controlled most of Wales. King Henry IV of England crushes the Welsh army in a series of Battles during 1410. Conwy Castle was again in the hands of the English King. Conwy Castle was used by the Royalist during the English Civil War in 1642. In 1646 the castle was besieged by the Roundheads, the Parliamentary forces for three months. After the restoration of the English monarchy the castle was purchased for £100 by Viscount Conwy in 1628. Conwy Castle is one of the most magnificent castles in North Wales.