Copper had been mined in Wales since the Bronze Age .
It was not until non-ferrous metalworking became a major industry in the late 17th century that Glamorgan saw a concentration of works appearing in a belt between Kidwelly and Port Talbot .
Although copper had been mined in Wales since the Bronze Age , it was not until non-ferrous metalworking became a major industry in the late 17th century that Glamorgan saw a concentration of works appearing in a belt between Kidwelly and Port Talbot .