Built to a concentric ‘walls within walls’ design and with strategic coastal access, they benefited from the attentions of the architectural genius of the age, Master James of St George.
Wedi’u hadeiladu yn ôl dyluniad ‘waliau o fewn waliau’ consentrig a chyda mynediad arfordirol strategol, roeddent yn elwa ar sylw athrylith bensaernïol yr oes, y pensaer James o San Siôr.