XIR215529: Near the ashes of Friederick II the Great of Prussia (1712-86), Tsar Alexander I (1777-1825) and King Friedrich Wilhelm III of Prussia (1770-1840) swearing immortal friendship, at Potsdam in the night of 4th to 5th November 1805, 1807 (engraving) (b/w photo), Wolf, Ulrich Ludwig (1776-1832) / Bridgeman Images