The Queen and Duke of Edinburgh hosted King Paul and Queen Frederica of Greece on their State Visit to Britain on this ay in 1963, 60 years ago, which was the first and only State Visit between the two countries during the Queen’s long Reign. King Paul was the first cousin of the Duke of Edinburgh and all four were related as descendants of Queen Victoria. 1963 was a busy year for the Greek Royal Family, with King Paul and Queen Frederica’s Silver Wedding Anniversary, the Engagement of Crown Prince Constantine of Greece and Princess Anne-Marie of Denmark, and the Centenary of the Greek Monarchy.