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
Frederick Ponsonby, 1st Baron Sysonby a British Army general. Lady Caroline, better known to history under her married name of Lady Caroline Lamb, was the wife of the future Prime Minister Lord Melbourne and lover of the poet Lord Byron. This lady was also a key figure in a film – played by Sarah Miles – in 1972. The father of the two siblings, Frederick's great-grandfather, was the 3rd Earl of Bessborough. The man wounded at Waterloo is not to be confused with another Ponsonby depicted on film, his kinsman General Sir William Ponsonby, whose death – possibly due to not risking his best horse