Princess Birgitta of Sweden marries Prince Johann Georg of Hohenzollern in a civil ceremony at the Royal Palace of Stockholm, May 1961. In the background are Princess Benedikte of Denmark and Princess Christina of Sweden. (Photo by Keystone/Hulton Archive/Getty Images)
SIGMARINGEN, GERMANY - JULY 30: Princess Birgitta of Sweden and her groom Prince Johann of Hohenzollern during their religious wedding ceremony on July 30, 1961 in Sigmaringen, Germany. (Photo by Gamma-Keystone via Getty Images)
