Austrian Archduke, Brother of Pretender, In Two-Roomed London flat was centre of "Incident" -- Archduke Robert of Austria at his flat in Kensington, London. Occupying a two-roomed flat in Kensington, London, is Archduke Robert of Austria, 31-year-old brother of Archduke Otto, Pretender to the Austrian throne. Archduke Robert lives in Belgium and is in England temporarily to put his affairs in order. Last December, he was the centre of an "incident" about which a question was asked in the House of Commons. July 16, 1946.