These are portraits of the tragic Empress of Mexico, Carlotta (or Charlotte of Belgium), married to Maximillian. The first is in 1857, prior to her marriage to Max. The second, in the 1860s as Empress. Third, in a photograph in full crinoline.
Her life was to be a fairy tale, but ended with sixty years confined in a mental hospital after her beloved husband was abandoned by his peers and executed by the Mexican revolutionaries.