Plas Newydd, Llangollen Plas Newydd, Llangollen Plas Newydd (, ; "new hall" or "new mansion") is a historic house in the town of Llangollen, Denbighshire, Wales, and was the home of the Ladies of Llangollen, Lady Eleanor Butler and Sarah Ponsonby, for nearly 50 years. Today, it is run as a museum by Denbighshire County Council. Plas Newydd is notable as the home where two Irish ladies, Lady Eleanor Butler and Miss Sarah Ponsonby (the Ladies of Llangollen) eloped and set up house together in the late 18th century, scandalising contemporary British society. Plas Newydd was originally a five-roomed stone cottage, but over
Maria Ponsonby, Viscountess Duncannon by their eldest son, John, and subsequently by their younger sons Frederick and Walter. Maria Ponsonby, Viscountess Duncannon Maria Ponsonby, Viscountess Duncannon (11 May 1787 – 19 March 1834), formerly Lady Maria Fane, was the wife of John Ponsonby, 4th Earl of Bessborough. She died before he inherited the earldom and thus was never Countess of Bessborough, but three of her sons were successively earls of Bessborough. She was the daughter of John Fane, 10th Earl of Westmorland, and his first wife, the former Sarah Anne Child. Her brother was John Fane, 11th Earl of Westmorland, and her sisters were