What was Johann Ernst Plamann's pupil, the future German chancellor, Duke of?
Johann Ernst Plamann Johann Ernst Plamann (22 June 1771, Repzin3 September 1834, Berlin) was a German child educator. He based his work on the ideas of Johann Heinrich Pestalozzi and Friedrich Ludwig Jahn. Among his pupils was future German chancellor Otto von Bismarck.
Ernest Augustus I, Duke of Saxe-Weimar-Eisenach Ernest Augustus I, Duke of Saxe-Weimar (German: "Ernst August I"; 19 April 1688 – 19 January 1748), was a duke of Saxe-Weimar and, from 1741, of Saxe-Weimar-Eisenach.