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
Joan, Lady of Wales the woman depicted on the coffin lid, which is not thought to belong to the coffin on which it now rests. Experts have suggested that the costume and style of carving belong to a much later decade than the 1230s when Joan died, although the coronet suggests a member of the royal family. Eleanor de Montfort is considered the most likely alternative. Joan, Lady of Wales Joan, Lady of Wales and Lady of Snowdon, also known by her Welsh name of Siwan, (c. 1191 – 2 February 1237) was the wife of Llywelyn the Great, Prince of Wales and Gwynedd,