During the Second World War, Queen Mary lived at Badminton House, owned by her niece's husband, the Duke of Beaufort. She continued her duties and supported the war effort. Following the war, she returned to her pre-war home, Marlborough House. She continued her public duties in old age, surviving to see her granddaughter, Elizabeth, ascend the throne as Queen Elizabeth II. After suffering from lung cancer (described publicly as "gastric problems"), Queen Mary died of the disease at Marlborough House on 24 March 1953. She lay in state at Westminster Hall before being buried beside her husband at St. George's Chapel at Windsor Castle. She survived her husband by 17 years and outlive three of her children, Prince John of the United Kingdom and Prince George Duke of Kent and King George VI.