Unscramble This Vintage Wedding Photo of the Queen and Prince Philip

Today Her Majesty and the Duke of Edinburgh celebrate 73 years of marriage. Last night the royal family's social media account share a photo of the couple reading cards from well-wishers, including one from their great-grandchildren, Prince George, Princess Charlotte and Prince Louis. The Queen (whose title was "Princess Elizabeth" at the time, since she wouldn't ascend the throne until Feb. 6, 1952) chose Norman Hartnell to design her wedding gown and 13-foot ivory silk net train, embroidered with pearl beads. That day, Philip, who renounced his title as prince of Greece and Denmark to become a British citizen, was given the title of His Royal Highness and created Duke of Edinburgh, Earl of Merioneth and Baron Greenwich by the bride's father, King George VI.