Habsburg Archduke in London with Baroness Fiancee -- Archduke Franz Joseph of Habsburg, photographed with his fiancee, Baroness Marta von Kahler, in London.Archduke Franz Joseph of Habsburg, son of Archduke Leopold Salvator of Austria and Archduchess Blanca, has just arrived in London for a visit with his fiancee, Baroness Marta von Kahler, a handsome German.The are to be married in September.For several years, the Archduke Franz Joseph has been living quietly in France, where he is a well-known figure on the Riviera. July 08, 1937. (Photo by Kosmos Press Bureau (Aust.)).