The fifth Marquess of Anglesey (1875 - 1905) was a colourful, flamboyant character who converted the chapel at Plas Newydd into a private theatre, known as the Gaiety Theatre and brought in theatre companies to stage lavish productions of popular plays and pantomimes. Admission was free and the Marquess often took the leading roles assisted by prominent actors from London. His passion for jewellery and clothes led him to bankruptcy on his personal estate. When he died aged thirty, without issue, the estate passed to his first cousin.
Plas Newydd (also formerly known as Anglesey Castle) is situated at Llanfairpwll on the banks of the Menai Straits, on the island of Anglesey, North Wales. The original building dates from the fourteenth century and has undergone additions and remodelling over the years, most notably by James Wyatt in the late eighteenth century. Plas Newydd has been home to the Paget and Bayly families who held the title of Earl of Uxbridge and, after 1815, Marquess of Anglesey when Lord Uxbridge was given the title Marquess of Anglesey for his heroism at Waterloo. In 1976 the Marquess gave the house to the National Trust, which currently administers the property.