Question: Where was the place of death of Rosita Spencer-Churchill, Duchess Of Marlborough's husband?

Knowledge 1: Rosita Spencer-Churchill, Duchess of Marlborough
Dagmar Rosita Astrid Libertas, Duchess of Marlborough(née Douglas, sometimes Spencer-Churchill; born 26 September 1943, Madrid) is a British artist of Swedish and German descent.She was the third wife of John Spencer-Churchill, 11th Duke of Marlborough, from 1972 until their divorce in 2008. [SEP] Knowledge 2: John Spencer-Churchill, 11th Duke of Marlborough
John George Vanderbilt Henry Spencer-Churchill, 11th Duke of Marlborough, (13 April 1926 – 16 October 2014) was a British peer.He was the elder son of The 10th Duke of Marlborough and his wife, The Hon.Alexandra Mary Hilda Cadogan.He was known as "Sunny" after his courtesy title of Earl of Sunderland.He was a relative of the Duke of Devonshire and a first cousin, twice removed, of the wartime Conservative Prime Minister, Sir Winston Churchill.He was also a distant relative of Diana, Princess of Wales, as both belonged to the Spencer family, and of the Vanderbilt family through his paternal grandmother, Consuelo Vanderbilt.His principal seat was Blenheim Palace, in Woodstock, Oxfordshire.He was ranked 224th in the Sunday Times Rich List 2004, with an estimated wealth of £185 million.His death was announced on 16 October 2014 by Blenheim Palace.
Knowledge 1: John Spencer-Churchill, 11th Duke of Marlborough
John George Vanderbilt Henry Spencer-Churchill, 11th Duke of Marlborough, (13 April 1926 – 16 October 2014) was a British peer.He was the elder son of The 10th Duke of Marlborough and his wife, The Hon.Alexandra Mary Hilda Cadogan.He was known as "Sunny" after his courtesy title of Earl of Sunderland.He was a relative of the Duke of Devonshire and a first cousin, twice removed, of the wartime Conservative Prime Minister, Sir Winston Churchill.He was also a distant relative of Diana, Princess of Wales, as both belonged to the Spencer family, and of the Vanderbilt family through his paternal grandmother, Consuelo Vanderbilt.His principal seat was Blenheim Palace, in Woodstock, Oxfordshire.He was ranked 224th in the Sunday Times Rich List 2004, with an estimated wealth of £185 million.His death was announced on 16 October 2014 by Blenheim Palace. [SEP] Knowledge 2: Consuelo Vanderbilt
Consuelo Vanderbilt Balsan (formerly Consuelo Spencer-Churchill, Duchess of Marlborough; born Consuelo Vanderbilt; 2 March 1877 – 6 December 1964) was a member of the prominent American Vanderbilt family.Her marriage to The 9th Duke of Marlborough has become an emblem of the socially advantageous, but loveless, marriages common during the Gilded Age.
Knowledge 1: John Spencer-Churchill, 11th Duke of Marlborough
John George Vanderbilt Henry Spencer-Churchill, 11th Duke of Marlborough, (13 April 1926 – 16 October 2014) was a British peer.He was the elder son of The 10th Duke of Marlborough and his wife, The Hon.Alexandra Mary Hilda Cadogan.He was known as "Sunny" after his courtesy title of Earl of Sunderland.He was a relative of the Duke of Devonshire and a first cousin, twice removed, of the wartime Conservative Prime Minister, Sir Winston Churchill.He was also a distant relative of Diana, Princess of Wales, as both belonged to the Spencer family, and of the Vanderbilt family through his paternal grandmother, Consuelo Vanderbilt.His principal seat was Blenheim Palace, in Woodstock, Oxfordshire.He was ranked 224th in the Sunday Times Rich List 2004, with an estimated wealth of £185 million.His death was announced on 16 October 2014 by Blenheim Palace. [SEP] Knowledge 2: Susan Spencer-Churchill, Duchess of Marlborough
Susan Spencer-Churchill, Duchess of Marlborough (10 April 1767 – 2 April 1841), formerly Lady Susan Stewart, was the wife of George Spencer-Churchill, 5th Duke of Marlborough.Lady Susan Stewart was the daughter of John Stewart, 7th Earl of Galloway, and his second wife, the former Anne Dashwood.She married the future duke on 15 September 1791, when he was styled Marquess of Blandford.They were married at her father's house in St James's Square, London, by the Archbishop of Canterbury, John Moore.They had four children:In 1817 the marquess inherited the dukedom from his father, George Spencer, 4th Duke of Marlborough, at which point his wife became Duchess of Marlborough.The duchess died at her house in Park Lane, London, aged 73.In the previous year two of her sons, Charles and Henry John, had died, along with Charles's wife and her husband the duke himself.She was buried in the chapel of Blenheim Palace.

Answer: Blenheim Palace