Deganwy is across the estuary from Conwy Castle. A Norman motte and bailey castle was built in the late eleventh century. It was then rebuilt by Llewellyn ap Iorwerth in the early thirteenth century but the site fell into English hands. Under Henry III the castle was strengthened but again was taken by the Welsh who then destroyed it to prevent it again falling into English hands. The remains seen today include the gatehouse towers foundations, elements of the curtain wall and the bailey ditches and banks. The site is located at Deganwy, south of Llandudno.