The "Ladies of Llangollen", Eleanor Butler (1739–1829) and Sarah Ponsonby (1755–1831), were two upper-class Irish women who lived together as a couple. Their relationship scandalised and fascinated their contemporaries. The pair moved to a Gothic house in Llangollen, North Wales, in 1780 after leaving Ireland to escape the social pressures of conventional marriages. Over the years, numerous distinguished visitors called upon them. Guests included Byron, Shelley, Wellington and Wordsworth, the last of whom wrote a sonnet about them.

Llangollen is a town and community, situated on the River Dee, in Denbighshire, Wales. Its riverside location forms the edge of the Berwyn range, and the Dee Valley section of the Clwydian Range and Dee Valley Area of Outstanding Natural Beauty, with the easternmost point of the Dee Valley Way being within the town. It had a population of 3,658 at the 2011 census.