Preparation is everything… and it’s no different when Cadw is about to embark on one of its largest and most complex projects at Castell Caernarfon.
Paratoi yw'r allwedd... ac mae hynny'n wir wrth i Cadw fynd ati gydag un o'i brosiectau mwyaf a mwyaf cymhleth yng Nghastell Caernarfon.