Queen Elizabeth II and King Frederik IX of Denmark pictured during a visit to the Memorial cemetery to the resistance movement, in May 1957. Photo: Getty
Queen Elizabeth II and Prince Philip, Duke of Edinburgh's visit to Denmark in May 1957. Photo: Getty
Queen Elizabeth II visits atomic Professor Niels Bohr in Denmark in May 1957. Photo: Getty
Queen Elizabeth and King Frederik IX of Denmark at Christiansborg Palace arriving for a state banquet in May 1957. . Photo: Getty
Prince Philip, Queen Elizabeth II, King Frederik and Queen Ingrid of Denmark in their box at the gala performance in the Royal Theatre, Copenhagen, May 1957. Photo: Getty
Queen Elizabeth II and Prince Philip, Duke of Edinburgh's visit to Denmark in May 1957. Photo: Getty
Queen Elizabeth II emerges from a wooden hut in Helsinki during a state visit to Finland, May 1976. Photo: Getty
Queen Elizabeth II in Helsinki during a state visit to Finland, May 1976. Photo: Getty
Queen Elizabeth ll enjoys a picnic lunch during a visit to Finland in May 1976 in Helsinki, Finland. Photo: Getty
Queen Elizabeth ll attends a banquet in May 1976 in Helsinki, Finland. Photo: Getty
Queen Elizabeth ll is greeted by Queen Margrethe in Copenhagen in May 1979. Photo: Getty
Queen Elizabeth ll waves from the balcony with Queen Margrethe of Denmark in Copenhagen in May 1979. Photo: Getty
Queen Elizabeth ll with Queen Margrethe of Denmark during a visit to Denmark in May 1979. Photo: Getty
Queen Elizabeth II in Sweden in May 1983. Photo: Getty
Queen Elizabeth II in Sweden in May 1983. Photo: Getty
Queen Elizabeth II and Queen Silvia of Sweden, in Sweden in May 1983. Photo: Getty
Queen Elizabeth II and Queen Silvia of Sweden, in Sweden in May 1983. Photo: Getty
Queen Elizabeth ll, accompanied by King Carl XVl Gustaf of Sweden, arriving for a State Banquet in May 1983 in Stockholm, Sweden. Photo: Getty
Queen Elizabeth II makes an official state visit to Iceland in June 1990. . Photo: Getty
Queen Elizabeth II in Reykjavik, Iceland in June 1990. Photo: Getty
Queen Elizabeth II with President Vigdis Finnbogadottir of Iceland in 1990. Photo: Getty
The Queen arriving for her state visit to Norway. King Harald of Norway accompanies her to review the Guard of Honour in 2001. Photo: Getty
The Queen with King Harald of Norway on a walkabout at Aker Brygge quayside, Oslo, Norway in 2001. Photo: Getty
The Queen and King Harald of Norway arriving for the State Banquet at the Royal Palace in Oslo, Norway in 2001. Photo: Getty
The Queen and Prince Philip arriving at the ambassador's residence in Oslo, Norway in 2001. Photo: Getty