Llywelyn ab Iorwerth also built Criccieth Castle (Gwynedd) about 1230, with an inner ward and a twin-towered gatehouse, and Castell Ewloe (Flintshire), with an inner ward and a strong D-shaped keep.
Mae wedi’i gryfhau gan haenau o hesian a’i ddiogelu mewn fframwaith pren.