Llangollen flow. The bridge was also widened in 1873 and again in 1968, using masonry which blended in with the older structure. It is a Grade I listed structure and a Scheduled Ancient Monument. On the outskirts of the town is Plas Newydd ("New Mansion" or "New Place"), from 1780 the home of the Ladies of Llangollen, the Honourable Sarah Ponsonby, Lady Eleanor Butler and their maid Mary Caryll. The Pillar of Eliseg is another old monument. There is an electoral ward of the same name. This ward includes Llantysilio community and has a total population taken at the 2011 census
Wales in the Roman era regions at different times. Tradition holds that Roman customs held on for several years in southern Wales, lasting into the end of the 5th century, and that is true in part. Caerwent continued to be occupied after the Roman departure, while Carmarthen was probably abandoned in the late 4th century. In addition, southwestern Wales was the tribal territory of the Demetae, who had never become thoroughly Romanised. The entire region of southernmost and southwestern Wales had been settled by Irish newcomers in the late 4th century, and it seems far-fetched to suggest that they were ever fully Romanised. Magnus Maximus