After the death of the last ruling duke, William I (who after 1870 was also German emperor), in 1888, the now purely honorific title was granted to Otto von Bismarck after his dismissal as Chancellor of Germany in 1890.
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The duchy has been held by various countries, including France from 1803 to 1805 and from 1810 to 1814, Prussia from 1805 to 1806, and Westphalia from 1806 to 1810.
Duke University | Duke Ellington | Duke | Duke of Wellington | Prince William, Duke of Cambridge | Duke of York | Duke of Norfolk | Duke of Edinburgh | Duke of Burgundy | Prince Arthur, Duke of Connaught and Strathearn | George Villiers, 1st Duke of Buckingham | Prince Andrew, Duke of York | Duke of Northumberland | Alfred, Duke of Saxe-Coburg and Gotha | Prince Richard, Duke of Gloucester | Prince Frederick, Duke of York and Albany | George Duke | Charles Lennox, 2nd Duke of Richmond | Louis Philippe II, Duke of Orléans | Edward Seymour, 1st Duke of Somerset | Philippe II, Duke of Orléans | John Frederick II, Duke of Saxony | Hugh Grosvenor, 2nd Duke of Westminster | George Monck, 1st Duke of Albemarle | Frederick Schomberg, 1st Duke of Schomberg | Fernando Álvarez de Toledo, 3rd Duke of Alba | Duke of Buccleuch | Archduke Charles, Duke of Teschen | Annie Duke | The Duke |