Blenheim Palace (/ˈblɛnəm/) (pronounced "Blen-im") is a monumental country house situated in Woodstock, Oxfordshire, England, residence of the dukes of Marlborough. It is the only non-royal non-episcopal country house in England to hold the title of palace. The palace, one of England's largest houses, was built between 1705 and circa 1724. UNESCO recognised the palace as a World Heritage Site in 1987.