To this day his legacy survives in a number of places – from the spot where he proclaimed himself ‘Prince of Wales’, to the castles he fought so hard to capture.
Mae ei etifeddiaeth wedi goroesi mewn sawl lle hyd heddiw – o'r man y cyhoeddodd mai ef oedd 'Tywysog Cymru', i'r cestyll y brwydrodd mor galed i'w cipio.