Blaenavon Furnace No.4

In 1788 three entrepreneurs from Stafforshire leased land around Blaenavon and established a major new ironworks using t he latest industrial methods. Initially there were three blast furnaces, all blown by steam power. It was immediately one of the largest ironworks in the world. The works continued to expand for the next seventy years, with the construction of two additional furnaces, and conversion to hot blast. Today the Blaenavon Ironworks is a world heritage site and the remains have seen considerable conservation work.