Colwyn Castle

{{Short description|Medieval castle in Wales}}

{{Use dmy dates|date=April 2022}}

{{Infobox military installation

|name=Colwyn Castle

|partof=

|image = Colwyn Castle, Powys, aerial view.jpg

|image_size = 220px

|caption = Colwyn Castle near Hundred House, Glascwm, Powys. The Roman Fort in which the later castle was built is clearly visible, as is the castle earthworks.

|location=Llansantffraed, Powys

|map_type=Wales

|map_alt=

|coordinates={{coord|52.1769|N|3.3065|W|type:landmark_region:GB|display=inline,title}}

|gridref={{gbmapping|SO10765399}}

}}

Colwyn Castle was a medieval castle near Llansantffraed in Wales. In the Manor of Glascwm, in the county of Radnorshire.It was built on the site of a Roman fort. The castle was captured in 1196 by Rhys ap Gruffydd, who was campaigning against the Normans.{{harvnb|Jones|1941|pp=136–137}} It was rebuilt in 1242 by Ralph de Mortimer to protect the lordship of Maelienydd, which he had recently acquired.{{harvnb|Lewis|1849|pp=85–98}}