Conwy Castle is a fortification in Conwy, located in North Wales. It was built by Edward I, during his conquest of Wales, between 1283 and 1287. Constructed as part of a wider project to create the walled town of Conwy, the combined defences cost around £15,000, a massive sum for the period. Over the next few centuries, the castle played an important part in several wars. It withstood the siege of Madog ap Llywelyn in the winter of 1294–95, acted as a temporary haven for Richard II in 1399 and was held for several months by forces loyal to Owain Glyndŵr in 1401.

Conwy, previously known in English as Conway, is a walled market town, community and the administrative centre of Conwy County Borough in North Wales. The walled town and castle stand on the west bank of the River Conwy, facing Deganwy on the east bank. The town formerly lay in Gwynedd and prior to that in Caernarfonshire. The community, which also includes Deganwy and Llandudno Junction, had a population of 14,753 at the 2011 census.