3508049 The Great Hall at Blenheim Palace, has a ceiling painted by James Thornhill with the Duke\'s apotheosis, 1754; (add.info.: The Great Hall at Blenheim Palace, has a ceiling painted by James Thornhill with the Duke\'s apotheosis. Blenheim Palace in Woodstock, 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 circa 1722. The Apotheosis is painted by James Thornhill.); Universal History Archive; out of copyright.