Dowlais Ironworks was one of the four principal ironworks in Merthyr. The other three were Cyfarthfa, Plymouth, and Penydarren Ironworks.
Read more about Dowlais Ironworks: Beginnings (1759–1807), The Era of John Josiah Guest (1807–1852), Reconstruction—Clark and Menelaus (1852–1899), The Era of GKN (1899–1973), British Steel—managing The Decline (1973–1987)