Portrait of the royal family: King Fredrik VIII of Denmark with his wife Louisa of Sweden and sons Christian of Denmark (King Christian X of Denmark), Charles of Denmark (King Haakon VII of Norway), Harald and Princess Louise of Denmark, Copenhagen, [Getty Images]

DENMARK - CIRCA 1875: Portrait of the royal family: King Fredrik VIII of Denmark with his wife Louisa of Sweden and sons Christian of Denmark (King Christian X of Denmark), Charles of Denmark (King Haakon VII of Norway), Harald and Princess Louise of Denmark, Copenhagen, Denmark - Date of Photo: 1880 ca. (Photo by Schou & Weller Hansen/Alinari via Getty Images) — see more

DENMARK - CIRCA 1875: Portrait of the royal family: King Fredrik VIII of Denmark with his wife Louisa of Sweden and sons Christian of Denmark (King Christian X of Denmark), Charles of Denmark (King Haakon VII of Norway), Harald and Princess Louise of Denmark, Copenhagen, Denmark - Date of Photo: 1880 ca. (Photo by Schou & Weller Hansen/Alinari via Getty Images)