Schlosshotel Kronberg

Princess Margaret's son Wolfgang, fearing for the family jewels, had buried them in a zinc-lined box in the subcellar of the castle.

[2] Many of the pieces were broken up and the gems sold separately, ruining the priceless heirlooms of the House of Hesse.

[2] Author Charles Higham claimed that Anthony Blunt, an MI5 agent and Soviet spy, acting on orders from the British royal family, made a successful secret trip to Schloss Friedrichshof towards the end of the war to retrieve sensitive letters between the Duke of Windsor and Adolf Hitler and other leading Nazis.

[4] What is certain is that George VI sent the Royal Librarian, Owen Morshead, accompanied by Blunt, then working part-time in the Royal Library as well as for British intelligence, to Friedrichshof in March 1945 to secure papers relating to the German Empress Victoria, the eldest child of Queen Victoria.

The papers rescued by Morshead and Blunt, and those returned by the American authorities from Chicago, were deposited in the Royal Archives.