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)
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)