January 29, 1820 (200): Death of King George III; Accession of King George IV (United Kingdom)
February 11, 1920 (100): Birth of King Farouk (1920-1965) (Egypt)
February 13, 1820 (200): Assassination of Charles, Duke of Berry (France) (died the next day)
February 29, 1920 (100): Restoration of the Kingdom of Hungary
March 14, 1820 (200): Birth of King Victor Emanuel II of Italy
March 26, 1920 (100): Death of Prince Luís of Orléans-Braganza (Brazil)
May 1, 1920 (100): Death of Crown Princess Margaret of Sweden
May 12, 1670 (350): Birth of King Augustus II "the Strong" of Poland & Saxony
May 16, 1770 (250): Marriage of Louis (XVI) and Marie Antoinette (France)
June 7-24, 1520 (500): Field of the Cloth of Gold (England/France)
June 14, 1870 (150): Birth of Queen Sophie of Greece
July 11, 1920 (100): Death of Empress Eugenie of France
July 18, 1920 (100): Death of Prince Joachim of Prussia
August 3, 1770 (250): Birth of King Friedrich Wilhelm III of Prussia
August 25, 1270 (750): Death of King St. Louis IX of France
August 25, 1845 (175): Birth of King Ludwig II of Bavaria
September 4, 1870 (150): Fall of Emperor Napoleon III and the Second Empire (France)
September 6, 1920 (100): Death of Grand Duchess Maria Pavlovna of Russia (née Mecklenburg-Schwerin)
September 20, 1870 (150): Fall of the Papal States
September 26, 1870 (150): Birth of King Christian X of Denmark
September 29, 1820 (200): Birth of Henri (V), Count of Chambord (France)
October 24, 1920 (100): Death of Grand Duchess Maria Alexandrovna of Russia, Duchess of Saxe-Coburg
October 25, 1920 (100): Death of King Alexander of Greece (monkey bite October 2)
November 3, 1935 (85): Restoration of King George II of Greece
November 3, 1970 (50): Death of King Peter II of Yugoslavia, Denver, CO
November 16, 1870 (150): Accession of King Amadeo I of Spain
November 24, 1960 (60): Death of Grand Duchess Olga of Russia
November 29, 1945 (75): Abolition of Yugoslav monarchy
December 19, 1920 (100): Restoration of King Constantine I of Greece