Princess Giovanna of Savoy (1907 - 2000), who married King Boris III of Bulgaria in 1930 and became known as Tsaritsa Ioanna of Bulgaria, 7th March 1923. (Photo by Keystone/Hulton Archive/Getty Images)

Princess Giovanna of Savoy (1907 - 2000), who married King Boris III of Bulgaria in 1930 and became known as Tsaritsa Ioanna of Bulgaria, 7th March 1923. (Photo by Keystone/Hulton Archive/Getty Images)