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.
Johannes Brenz Johann (Johannes) Brenz (24 June 1499 – 11 September 1570) was a German theologian and the Protestant Reformer of the Duchy of Württemberg.