Blenheim Palace Blenheim Palace Blenheim Palace (pronounced ) 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. The palace is named for the 1704 Battle of Blenheim, and thus ultimately after Blindheim (also known as Blenheim) in Bavaria. It was originally intended to be a reward to John Churchill, 1st Duke of Marlborough for his
Blenheim Palace as "The Temple of Diana" down by the lake, where in 1908 Winston Churchill proposed to his future wife. The extensive landscaped park, woodlands and formal gardens of Blenheim are Grade I listed on the Register of Historic Parks and Gardens. On the death of the 1st Duke in 1722, as both his sons were dead, he was succeeded by his daughter Henrietta. This was an unusual succession and required a special Act of Parliament, as only sons can usually succeed to a dukedom. When Henrietta died, the title passed to Marlborough's grandson Charles Spencer, Earl of Sunderland, whose mother