Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 138,127 pages of information and 223,036 images on early companies, their products and the people who designed and built them.
The castle, now a museum, is the former home of the Crawshay family.
It houses an excellent display of items relating to local social history and local industries in general, and to Cyfarthfa Ironworks specifically. There is also a fine collection of the Crawshay's family's paintings, drawings, sculptures, porcelain, and artefacts from ancient Egypt and Rome. The porcelain collection contains many items from the Nantgarw Pottery.
 Cyfarthfa Castle Museum and Park website