Blenheim Palace is a historic country house located in Oxfordshire, England. It was built in the early 18th century and is the principal residence of the Duke of Marlborough. The palace is renowned for its stunning architecture and beautiful gardens, which are designed in the English Baroque style. The palace is also famous as the birthplace of Winston Churchill, the British Prime Minister during World War II. In 1987, Blenheim Palace was designated a UNESCO World Heritage Site, recognizing its cultural significance and historical importance in British history.