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Count Philip Christoph von Königsmarck (4 March 1665 – 2 July 1694), also spelled Philipp, was a Swedish count and soldier. He was allegedly the lover of Sophia Dorothea, Princess of Celle, the wife of Duke George Louis of Brunswick and Lüneburg, the heir presumptive of the Principality of Calenberg, later to become Elector of Hanover (as George I Louis, 1708) and King of Great Britain (as George I, 1714).