The part played by the many German and Austrian royal families in opposing Hitler has hitherto been overlooked. Prince Louis Ferdinand of Prussia was deeply involved in the German resistance movement and was questioned by the Gestapo following the 20 July plot on Hitler's life; Otto von Habsburg, heir to the Austro-Hungarian Empire, was sentenced to death and escaped through Europe to America, where he helped coordinate attempts to liberate his homeland; his Hohenberg cousins (children of the Archduke Franz Ferdinand) were incarcerated in Dachau; Crown Prince Rupprecht of Bavaria was exiled to Italy where he was pursued by the SS - his wife and children were captured and sent to concentration camps; the exiled Prince Hubertus zu Löwenstein travelled between the USA and Britain assembling German exiles into groups representing the real Germany - that could assume power when Hitler was defeated. The sweeping away of German and Austrian monarchs in 1918 made the rise of Hitler possible; their successors helped make possible his defeat.