Penllyn Castle is a Norman-style country house, dating mainly from the Victorian period, located in Cowbridge, 4 miles (6.4 km) south-east of Bridgend, South Wales.
Built by Robert Fitzhamon in 1135, the sheriff Earl of Gloucester, it shares an oblong tower like contemporary Ogmore Castle.
[2] Reportedly attacked by Owain Glyndŵr,[2] today the two surviving main walls of the original castle stand on the edge of a low cliff above the River Thaw.
[1][2] In Tudor times, the Turbeville family built a manor house in the residual grounds, for which the former castle keep forms one corner.
[3] Homfray demolished most of Miss Gwinnett's manor house, and rebuilt it in a contemporary Victorian architecture style with stucco-plaster walls, which itself today is only Grade II listed.