What was Johann Ernst Plamann's pupil, the future German chancellor, Duke of?
Otto von Bismarck: Otto Eduard Leopold, Prince of Bismarck, Duke of Lauenburg (1 April 1815 – 30 July 1898), known as Otto von Bismarck (] ), was a conservative Prussian statesman who dominated German and European affairs from the 1860s until 1890.
i don't know