After falling under English rule in the 16th century, Glamorgan became a more stable county, and exploited its natural resources to become an important part of the Industrial Revolution. Glamorgan was the most populous and industrialised county in Wales, and was once called the "crucible of the Industrial Revolution", as it contained the world centres of three metallurgical industries (iron, steel and copper) and its rich resources of coal.
After falling under English rule in the 16th century, Glamorgan became a more stable county and exploited its natural resources to become an important part of the Industrial Revolution Glamorgan was the most populous and industrialised county in Wales, and was once called the "crucible of the Industrial Revolution", as it contained the world centres of three metallurgical industries (iron, steel and copper) and its rich resources of coal