725452 Frederick William, the Great Elector (1620-1688), crossing the Curonian Lagoon by sledge in an expedition against the Swedish in 1678 (colour litho) by Rohling, Carl (1849-1922); Private Collection; (add.info.: Frederick William, the Great Elector (1620-1688), crossing the Curonian Lagoon by sledge in an expedition against the Swedish in 1678. Illustration from House of Hohenzollern in Pictures and Words by Carl Rohling and Richard Sternfeld. Published by Martin Oldenbourg in Berlin, c 1900.); 穢 Look and Learn.