Caerphilly Castle is widely regarded as one of the great castles of medieval western Europe.Its massive walls and towers were combined with sprawling water defences, creating a fortress not just of enormous strength, but also one that would serve as a potent symbol of lordship and power.Caerphilly is of further interest as an early example of the concentric (walls-within-walls) principle of defence. Several of its features were subsequently adopted in the great castles built by King Edward I (1272–1307) in north Wales.
