St Quintins Castle is a castle located in the village of Llanblethian, Cowbridge, Wales. It is a scheduled monument and a Grade II listed building and is under the care of Cadw. The site was first occupied with a defensive structure in about 1102 and the gatehouse and further building work took place around 1312. It was later used as a prison and was reported as being in a ruinous state by 1741. Virtual Tour