circa 1863: Charlotte, Empress of Mexico (1840 - 1927), the daughter of Leopold I, King of Belgium, and wife of the ill-fated emperor of Mexico, Maximilian. (Photo by Hulton Archive/Getty Images)
circa 1890: Louise Marie Amelie, Princess of Saxe-Coburg-Gotha. She was born Princess Louise Marie Amelie of Belgium, and married Prince Philip of Saxe-Coburg-Gotha in 1875. The marriage was dissolved in 1906. (Photo by Hulton Archive/Getty Images)
UNSPECIFIED - JUNE 23: Stephanie of Belgium (1864-1945) wife of Rodolphe of Habsburg (dead atMayerling), c. 1895, Felix Potin collection (Photo by Apic/Getty Images)
UNSPECIFIED - JULY 31: Princess Clementine (1872-1955) daughter of king of belgium LeopoldII c. 1900 (Photo by Apic/Getty Images)
circa 1920: Princess Astrid of Belgium (1905 - 1935). (Photo by Hulton Archive/Getty Images)
