title: Blenheim Palace
context: BlenheimPalace (pronounced  /ˈblɛnɪm/ BLEN-im[1]) is a monumental country house in Blenheim, Oxfordshire, England. It is the principal residence of the Dukes of Marlborough, and 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 1722, and designated a UNESCO World Heritage Site in 1987.[2]
question: When was Blenheim Palace built?
answers: between 1705 and 1722