Hanussen claimed to be a Danisharistocrat, but was in fact a CzechJew, born under the name Hermann Steinschnieder.
He performed a mind reading and hypnosis act that catapulted him to stardom. He enjoyed the company of Germany's elite, including becoming close with members of the SA (Sturmabteilung). He was apparently a supported of Nazi ideology, in spite of his Jewish ancestry, which was never a very well kept secret.
His most famous feat of precognition was predicting the burning of the Reichstag, the decisive event that led to Hitler siezing absolute power in Germany. He was assassinated shortly after that, presumably because he knew too much.
Hanussen, also known as Erich Jan Hanussen, was German mentalist, occultist, and astrologer, active in Weimar Germany and also during the very early years of Nazi Germany.
Hanussen claimed to be a Danish aristocrat but was in fact a Czech Jew, born under the name Hermann Steinschnieder.
He was assassinated shortly after that (most likely by the Nazis) and hastily buried in a field in the outskirts of Berlin, presumably because he knew too much.