Queen Olga of Greece, grandmother of the Duke of Edinburgh, was born on this day in 1851. Born Grand Duchess Olga Constantinovna of Russia, the daughter of Grand Duke Constantine Nikolaievich and Princess Alexandra of Saxe-Altenburg. In 1867, she married King George I of Greece, the Danish Prince who just been elected to the Greek Throne, becoming the Queen of Greece at the age of 16. The couple had eight children, and among their descendants are Royals in Greece, Spain, the United Kingdom, Romania, Serbia, and Italy. Queen Olga was immensely popular in Greece, even during the Royal Family’s frequent exiles, and was even appointed Regent after the death of her grandson, King Alexander, and was the only member of the family given a pension by the Republican government. She passed away in exile in 1926, and after being initially buried in Rome, she was reinterred in the Royal Cemetery at Tatoi after the Restoration of the Monarchy in 1936.