During his rebellion, Owain Glyndŵr besieged many of Cadw’s famous castles, including Caernarfon, Coety, Dinefwr and Kidwelly.
Yn ystod ei wrthryfel, ymosododd Owain Glyndŵr ar lawer o gestyll enwog Cadw, gan gynnwys Caernarfon, Coety, Dinefwr a Chydweli.