XEE4140630: Prince Frederic Guillaume Louis (later William I, King of Prussia and Emperor of Germany, 1797-1888) was sworn in as regent of the kingdom in the White Salon of the Palace of Berlin (Germany) in 1858. Engraving in “” Le Monde illustrious”” n°84 of 20 November 1858., French School, (19th century) / Bridgeman Images