Chirk Castle is a Grade I listed castle located in Chirk, Wrexham County Borough, Wales, 1.5 mi from Chirk railway station, now owned and run by the National Trust. The castle was built in 1295 by Roger Mortimer de Chirk, uncle of Roger Mortimer, 1st Earl of March as part of Edward I's chain of fortresses across the north of Wales, guarding the entrance t…Chirk Castle is a Grade I listed castle located in Chirk, Wrexham County Borough, Wales, 1.5 mi from Chirk railway station, now owned and run by the National Trust. The castle was built in 1295 by Roger Mortimer de Chirk, uncle of Roger Mortimer, 1st Earl of March as part of Edward I's chain of fortresses across the north of Wales, guarding the entrance to the Ceiriog Valley. It was the administrative centre for the Marcher Lordship of Chirkland. It was run as a March castle by the Layards Edwardes of Chirk until removed by the Star Chamber when it was taken up by the Myddelton family. The Edwardes coat of arms is preserved in the castle. Edwardes became the Barony of Kensington.