New Wardour Castle is a Grade I listed English country house at Wardour, near Tisbury in Wiltshire, built for the Arundell family. The house is of Palladian style, designed by the architect James Paine, with additions by Giacomo Quarenghi, who was a principal architect of the Imperial Russian capital city, Saint Petersburg. The building of the house was begun in 1769 and completed in 1776, with additional buildings being added in the 1970s and 1980s. From 1961 to 1990, it was the home of Cranborne Chase School, an independent boarding school for girls.