A digital impressionist painting, using Gruppe in DAP plus Gimp, of a wood-engraving of the ruins of Coity Castle, using an out of copyright, black and white image from http://www.fromoldbooks.org
The image source is B.B.Woodward "History of Wales 1853.
Coity Castle in Glamorgan, Wales is a Norman castle built by Sir Payn “the Demon” de Turberville, one of the legendary Twelve Knights of Glamorgan supposed to have conquered Glamorgan under the leadership of Robert FitzHamon(d.1107)
The castle began as a late 11th century ringwork. A rectangular stone keep and the main curtain wall were added by the Normans in the 12th century, under the de Turberville family. The three-storey keep was primarily a defensive structure.