3101028 Fireworks at the castle of the Margrave of Brandenburg at Colln on the River Spree on the occasion of the visit of King Christian IV of Denmark, 10 October 1595 (etching) by German School, (16th century) (after); Private Collection; (add.info.: Fireworks at the castle of the Margrave of Brandenburg at Colln on the River Spree on the occasion of the visit of King Christian IV of Denmark, 10 October 1595. Illustration from Geschichte des Preussischen Staates (History of the Prussian State) by Dr Ernst Berner (Emil Strauss, Bonn, 1896).); 穢 Look and Learn.