David. The Best Gallery, Long Gallery, Old Library and Chapel were all added due to Wren. In 1707, Thomas Thynne founded a grammar school for boys in the market town of Warminster, near to his family seat, to teach the boys of Warminster, Longbridge Deverill, and Monkton Deverill. Over time this became known as the Lord Weymouth School; in 1973 Lord Weymouth's School merged with St. Monica's School for girls and continues today as Warminster School. Thomas Thynne, 2nd Viscount Weymouth (1710–1751) married Louisa Carteret, whose ghost is reputed to haunt the house as the 'Green Lady'. Thomas Thynne, 1st Marquess of Bath (1734–1796) employed Capability Brown who replaced the formal gardens with a landscaped park and dramatic drives and entrance roads. Thomas Thynne, 2nd Marquess of Bath (1765–1837) employed Jeffry Wyatville to modernise the house and received advice from Humphrey Repton on the grounds. Wyatville demolished several parts of the house, including Wren's staircase, and replaced them with galleries and a grand staircase. He also constructed many outbuildings including the Orangery. Henry Thynne, 3rd Marquess of Bath (1797–1837). John Thynne, 4th Marquess of Bath (1831–1896) collected Italian fine arts. He employed John Crace, whose prior work included Brighton Pavilion, Woburn Abbey, Chatsworth House and the Palace of Westminster, to add Italian renaissance style interiors. Thomas Thynne, 5th Marquess of Bath (1862–1946). During World War I, the house was used as a temporary hospital. During World War II, it became the evacuated Royal School for Daughters of Officers of the Army. An American hospital was also constructed in the grounds. Henry Thynne, 6th Marquess of Bath (1905–1992). In 1947, death duties forced the sale of a large part of the Marquess' estates; to allow Longleat itself to survive, he opened the house to public visitors. Russell Page redesigned the gardens around the house to allow for tourists. The safari park opened in 1966. Alexander Thynn, 7th Marquess of Bath (1932–2020) was an artist and mural painter with a penchant for mazes and labyrinths: he created the hedge maze, the love labyrinth, the sun maze, the lunar labyrinth and King Arthur's maze on the property. Ceawlin Thynn, 8th Marquess of Bath (born 1974). The house is still used as the private residence of the Thynn family. The house was designated as Grade I listed in 1968. The formal gardens, pleasure grounds and parkland were listed Grade I on the Register of