3101264 Leonhard Thurneysser, scholar and alchemist at the court of Elector John George of Brandenburg (woodcut) by English School, (19th century); Private Collection; (add.info.: Leonhard Thurneysser (1531-1596), scholar and alchemist at the court of Elector John George of Brandenburg. Illustration from Geschichte des Preussischen Staates (History of the Prussian State) by Dr Ernst Berner (Emil Strauss, Bonn, 1896).); 穢 Look and Learn.