Castle Ditch Caernarfon,
LL55 2AY Gwynedd, UK
Caernarfon Castle, often anglicized as Carnarvon Castle, is a medieval fortress in Caernarfon, Gwynedd, north-west Wales cared for by Cadw, the Welsh Government's historic environment service. There was a motte-and-bailey castle in the town of Caernarfon from the late 11th century until 1283 when King Edward I of England began replacing it with the current stone structure. The Edwardian town and castle acted as the administrative centre of north Wales and as a result the defences were built on a grand scale. There was a deliberate link with Caernarfon's Roman past and the Roman fort of Segontium is nearby.
While the castle was under construction, town walls were built around Caernarfon. The work cost between £20,000 and £25,000 from the start until the end of work in 1330.