Williamstown Cottages
Stepped terrace of industrial housing set into the hillside below Cyfarthfa Castle, facing over River Taff towards the site of former Cyfarthfa Ironworks. They are an important example of early workers' housing and the longest industrial terrace now remaining in largely unaltered condition. They are Grade II Listed Buildings.
Williamstown, Cae-Pant-Tywyll, Tydfil's Well and Morgan Town developed at the end of the 18th century, as an ironworks settlement based around the Cyfarthfa Iron Works. By 1814, the settlement comprised of short rows of cottages to either side of Brecon Road, including Castle Square (Pandy Place), the tollhouse, Quarry Row and Bethesda Street. The settlement was largely complete by 1836.