In 1801 Merthyr Tydfil was the largest town in Wales, and Cardiff was a place of fewer than two thousand people. Fifty years later the Dowlais works on the hill above the town was the largest ironworks in the world, and iron from this one valley was going into railways on every continent. This is the whole arc: how a bare Welsh hillside became the furnace of an empire, and why almost none of the money stayed.

What you'll learn
• Why iron ore, coal, limestone and fast water all sat in one hillside at the head of the Taff, and how smelting with coke instead of charcoal turned that geology into the largest ironworks on Earth.
• How the Crawshays built Cyfarthfa and the Guests built Dowlais — eighteen blast furnaces and around 88,400 tons of iron a year by 1845 — and how the works came to own the houses, the shops and the wages too.
• What it cost to live there: cellar dwellings and the truck system, the cholera summer of 1849, an average age at death of about seventeen and a half, and the rising of 1831 that ended with Dic Penderyn on the gallows.
• Why phosphorus, imported Spanish ore and the Bessemer converter pulled steelmaking down to the coast, what happened when Dowlais stopped in 1930, and what still stands on the hillside today.

Educational and historical content.

Key sources
— Census returns for the parish and borough of Merthyr Tydfil, 1801–1921 (A Vision of Britain Through Time)
— T. W. Rammell, Report to the General Board of Health on a Preliminary Inquiry into the Sewerage, Drainage and Supply of Water ... of the Parish of Merthyr Tydfil (1850)
— Coflein / RCAHMW and Cadw listings: the Cyfarthfa blast furnaces, Ynysfach Engine House, the Dowlais Stables and Pont-y-Cafnau
— Glamorgan Archives: the Dowlais Iron Company and Cyfarthfa Iron Works records
— Amgueddfa Cymru / St Fagans National Museum of History: the Rhyd-y-car ironworkers' cottages
— and other sources

#history #Wales #MerthyrTydfil #industrialheritage #TheVanishedIsles